diff --git a/.github/ISSUE_TEMPLATE/Bug_report.md b/.github/ISSUE_TEMPLATE/Bug_report.md
index 3485a689..a2df8dca 100644
--- a/.github/ISSUE_TEMPLATE/Bug_report.md
+++ b/.github/ISSUE_TEMPLATE/Bug_report.md
@@ -47,7 +47,7 @@ assignees: ''
 
 <!-- Please add an `x` to the respective line. -->
 
-- [ ] latest release version 3.7.3
+- [ ] latest release version 3.9.0
 - [ ] other release - please state the version: ___
 - [ ] the `develop` branch
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7ee9381d..d5d0ae34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_minimum_required(VERSION 3.1)
 ## PROJECT
 ## name and version
 ##
-project(nlohmann_json VERSION 3.8.0 LANGUAGES CXX)
+project(nlohmann_json VERSION 3.9.0 LANGUAGES CXX)
 
 ##
 ## INCLUDE
diff --git a/ChangeLog.md b/ChangeLog.md
index 63ff3fb4..7a762275 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,13 +1,129 @@
 # Changelog
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [v3.9.0](https://github.com/nlohmann/json/releases/tag/v3.9.0) (2020-07-27)
+
+[Full Changelog](https://github.com/nlohmann/json/compare/v3.8.0...v3.9.0)
+
+- Unknown Type Name clang error when using NLOHMANN\_DEFINE\_TYPE\_NON\_INTRUSIVE [\#2313](https://github.com/nlohmann/json/issues/2313)
+- Clang 10.0 / GCC 10.1 warnings on disabled exceptions [\#2304](https://github.com/nlohmann/json/issues/2304)
+- Application stalls indefinitely with message byte size 10 [\#2293](https://github.com/nlohmann/json/issues/2293)
+- linker error [\#2292](https://github.com/nlohmann/json/issues/2292)
+- Add support for high-precision numbers in UBJSON encoding [\#2286](https://github.com/nlohmann/json/issues/2286)
+- NLOHMANN\_DEFINE\_TYPE\_NON\_INTRUSIVE fails if the length of the argument is 10 [\#2280](https://github.com/nlohmann/json/issues/2280)
+- Custom types : MACRO expansion bug [\#2267](https://github.com/nlohmann/json/issues/2267)
+- to/from\_json Failing To Convert String [\#2238](https://github.com/nlohmann/json/issues/2238)
+- clang 9.0 report warning: unused type alias 'size\_type' \[-Wunused-local-typedef\] [\#2221](https://github.com/nlohmann/json/issues/2221)
+- Enormous array created when working with map\<int,T\> [\#2220](https://github.com/nlohmann/json/issues/2220)
+- Can I disable sorting of json values [\#2219](https://github.com/nlohmann/json/issues/2219)
+- Getting Qt types to work [\#2217](https://github.com/nlohmann/json/issues/2217)
+- Convert to Qt QVariant  [\#2216](https://github.com/nlohmann/json/issues/2216)
+- How to custom serialize same data type of vector? [\#2215](https://github.com/nlohmann/json/issues/2215)
+- json constructor does not support std::optional [\#2214](https://github.com/nlohmann/json/issues/2214)
+- Failing to Parse Valid JSON [\#2209](https://github.com/nlohmann/json/issues/2209)
+- \(De-\)Serialization of std::variant with namespaces [\#2208](https://github.com/nlohmann/json/issues/2208)
+- Addint support for complex type [\#2207](https://github.com/nlohmann/json/issues/2207)
+- array\_index possible out of range [\#2205](https://github.com/nlohmann/json/issues/2205)
+- Object deserialized as array [\#2204](https://github.com/nlohmann/json/issues/2204)
+- Sending to a function a reference to a sub-branch [\#2200](https://github.com/nlohmann/json/issues/2200)
+- How to Serialize derived class to JSON object?  [\#2199](https://github.com/nlohmann/json/issues/2199)
+- JSON incorrectly serialized [\#2198](https://github.com/nlohmann/json/issues/2198)
+- Exception Unhandled out\_of\_range error [\#2197](https://github.com/nlohmann/json/issues/2197)
+- msgpack serialisation : float is treated as 64bit float, not 32bit float. [\#2196](https://github.com/nlohmann/json/issues/2196)
+- Is it possible to use compile-time type guarantees for JSON structures? [\#2195](https://github.com/nlohmann/json/issues/2195)
+- Question : performance against python dict [\#2194](https://github.com/nlohmann/json/issues/2194)
+- vs2017 compile error [\#2192](https://github.com/nlohmann/json/issues/2192)
+- Check if a key exists [\#2191](https://github.com/nlohmann/json/issues/2191)
+- Failed to run tests due to missing test data on builders without Internet access [\#2190](https://github.com/nlohmann/json/issues/2190)
+- 3.8.0: unit-cbor.cpp test failures [\#2189](https://github.com/nlohmann/json/issues/2189)
+- 'nlohmann/json.hpp' file not found [\#2188](https://github.com/nlohmann/json/issues/2188)
+- How to send json data over the wire? [\#2185](https://github.com/nlohmann/json/issues/2185)
+- Ubuntu 16 not supporting nlohmann/json? [\#2184](https://github.com/nlohmann/json/issues/2184)
+- .get\<std::string\> causing emdash errors [\#2180](https://github.com/nlohmann/json/issues/2180)
+- Object properties should not be re-sorted alphabetically [\#2179](https://github.com/nlohmann/json/issues/2179)
+- Custom type registration : instrusive API [\#2175](https://github.com/nlohmann/json/issues/2175)
+- Many version of the function "void to\_json\(json& j, const MyStruct& struct\)" [\#2171](https://github.com/nlohmann/json/issues/2171)
+- How should strings be escaped? [\#2155](https://github.com/nlohmann/json/issues/2155)
+- Adding a value to an existing json puts it at the beginning instead of the end [\#2149](https://github.com/nlohmann/json/issues/2149)
+- The header file is big, can we use what we need. [\#2134](https://github.com/nlohmann/json/issues/2134)
+- Changing the default format for unordered\_map \(or other set\) [\#2132](https://github.com/nlohmann/json/issues/2132)
+- Getting size of deserialized bson document [\#2131](https://github.com/nlohmann/json/issues/2131)
+- implicit conversion failure [\#2128](https://github.com/nlohmann/json/issues/2128)
+- Error thrown when parsing in a subclass [\#2124](https://github.com/nlohmann/json/issues/2124)
+- explicit conversion to string not considered for std::map keys in GCC8 [\#2096](https://github.com/nlohmann/json/issues/2096)
+- Add support for JSONC [\#2061](https://github.com/nlohmann/json/issues/2061)
+- Library provides template arg for string\_type but assumes std::string in some places [\#2059](https://github.com/nlohmann/json/issues/2059)
+- incremental parsing with sax\_parser [\#2030](https://github.com/nlohmann/json/issues/2030)
+- Question about flatten and unflatten [\#1989](https://github.com/nlohmann/json/issues/1989)
+- CBOR parser doesn't skip tags [\#1968](https://github.com/nlohmann/json/issues/1968)
+- Compilation failure using Clang on Windows [\#1898](https://github.com/nlohmann/json/issues/1898)
+- Fail to build when including json.hpp as a system include [\#1818](https://github.com/nlohmann/json/issues/1818)
+- Parsing string into json doesn't preserve the order correctly. [\#1817](https://github.com/nlohmann/json/issues/1817)
+- \[C++17\] Allow std::optional to convert to nlohmann::json [\#1749](https://github.com/nlohmann/json/issues/1749)
+- How can I save json object in file in order?  [\#1717](https://github.com/nlohmann/json/issues/1717)
+- Support for Comments [\#1513](https://github.com/nlohmann/json/issues/1513)
+- clang compiler: error : unknown type name 'not' [\#1119](https://github.com/nlohmann/json/issues/1119)
+- dump\(\) without alphabetical order [\#1106](https://github.com/nlohmann/json/issues/1106)
+- operator T\(\) considered harmful [\#958](https://github.com/nlohmann/json/issues/958)
+- Order of the elements in JSON object [\#952](https://github.com/nlohmann/json/issues/952)
+- How to prevent alphabetical sorting of data? [\#727](https://github.com/nlohmann/json/issues/727)
+- Why is an object ordering values by Alphabetical Order?  [\#660](https://github.com/nlohmann/json/issues/660)
+- Feature request: Comments [\#597](https://github.com/nlohmann/json/issues/597)
+- Head Elements Sorting [\#543](https://github.com/nlohmann/json/issues/543)
+- Automatic ordered JSON [\#424](https://github.com/nlohmann/json/issues/424)
+- Support for comments. [\#376](https://github.com/nlohmann/json/issues/376)
+- Optional comment support. [\#363](https://github.com/nlohmann/json/issues/363)
+- Strip comments / Minify [\#294](https://github.com/nlohmann/json/issues/294)
+- maintaining order of keys during iteration [\#106](https://github.com/nlohmann/json/issues/106)
+
+- Update documentation [\#2312](https://github.com/nlohmann/json/pull/2312) ([nlohmann](https://github.com/nlohmann))
+- Fix bug in CBOR tag handling [\#2308](https://github.com/nlohmann/json/pull/2308) ([nlohmann](https://github.com/nlohmann))
+- added inline to NLOHMANN\_DEFINE\_TYPE\_NON\_INTRUSIVE macro [\#2306](https://github.com/nlohmann/json/pull/2306) ([jwittbrodt](https://github.com/jwittbrodt))
+- fixes unused variable 'ex' for \#2304 [\#2305](https://github.com/nlohmann/json/pull/2305) ([AODQ](https://github.com/AODQ))
+- Cleanup [\#2303](https://github.com/nlohmann/json/pull/2303) ([nlohmann](https://github.com/nlohmann))
+- Add test with multiple translation units [\#2301](https://github.com/nlohmann/json/pull/2301) ([nlohmann](https://github.com/nlohmann))
+- Merge GitHub actions [\#2300](https://github.com/nlohmann/json/pull/2300) ([nlohmann](https://github.com/nlohmann))
+- Fix unused parameter [\#2299](https://github.com/nlohmann/json/pull/2299) ([nlohmann](https://github.com/nlohmann))
+- Add support for high-precision numbers in UBJSON encoding [\#2297](https://github.com/nlohmann/json/pull/2297) ([nlohmann](https://github.com/nlohmann))
+- fix eof for get\_binary and get\_string [\#2294](https://github.com/nlohmann/json/pull/2294) ([jprochazk](https://github.com/jprochazk))
+- Serialisation macros: increase upper bound on number of member variables [\#2287](https://github.com/nlohmann/json/pull/2287) ([pfeatherstone](https://github.com/pfeatherstone))
+- add inline specifier for detail::combine [\#2285](https://github.com/nlohmann/json/pull/2285) ([T0b1-iOS](https://github.com/T0b1-iOS))
+- Add static assertion for missing binary function in SAX interface [\#2282](https://github.com/nlohmann/json/pull/2282) ([nlohmann](https://github.com/nlohmann))
+- Add test for target\_include\_directories [\#2279](https://github.com/nlohmann/json/pull/2279) ([nlohmann](https://github.com/nlohmann))
+- Clean up maintainer Makefiles and fix some linter warnings [\#2274](https://github.com/nlohmann/json/pull/2274) ([nlohmann](https://github.com/nlohmann))
+- Add option to ignore CBOR tags [\#2273](https://github.com/nlohmann/json/pull/2273) ([nlohmann](https://github.com/nlohmann))
+- Hash function without allocation [\#2269](https://github.com/nlohmann/json/pull/2269) ([nlohmann](https://github.com/nlohmann))
+- Add ClangCL for MSVC [\#2268](https://github.com/nlohmann/json/pull/2268) ([t-b](https://github.com/t-b))
+- Makefile: Always use SED variable [\#2264](https://github.com/nlohmann/json/pull/2264) ([t-b](https://github.com/t-b))
+- Add Xcode 12 CI [\#2262](https://github.com/nlohmann/json/pull/2262) ([nlohmann](https://github.com/nlohmann))
+- Make library work with Clang on Windows [\#2259](https://github.com/nlohmann/json/pull/2259) ([nlohmann](https://github.com/nlohmann))
+- Add ordered\_json specialization with ordered object keys [\#2258](https://github.com/nlohmann/json/pull/2258) ([nlohmann](https://github.com/nlohmann))
+- Add pkg-config file [\#2253](https://github.com/nlohmann/json/pull/2253) ([ericonr](https://github.com/ericonr))
+- Fix regression from \#2181 [\#2251](https://github.com/nlohmann/json/pull/2251) ([nlohmann](https://github.com/nlohmann))
+- Tag binary values in cbor if set [\#2244](https://github.com/nlohmann/json/pull/2244) ([matthewbauer](https://github.com/matthewbauer))
+- Make assert configurable via JSON\_ASSERT [\#2242](https://github.com/nlohmann/json/pull/2242) ([nlohmann](https://github.com/nlohmann))
+- Add specialization of get\_to [\#2233](https://github.com/nlohmann/json/pull/2233) ([nlohmann](https://github.com/nlohmann))
+- Refine documentation of error\_handler parameter [\#2232](https://github.com/nlohmann/json/pull/2232) ([nlohmann](https://github.com/nlohmann))
+- Simplify conversion from/to custom types [\#2225](https://github.com/nlohmann/json/pull/2225) ([nlohmann](https://github.com/nlohmann))
+- Remove unused typedefs [\#2224](https://github.com/nlohmann/json/pull/2224) ([nlohmann](https://github.com/nlohmann))
+- Enable CMake policy CMP0077 [\#2222](https://github.com/nlohmann/json/pull/2222) ([alexreinking](https://github.com/alexreinking))
+- Add option to ignore comments in parse/accept functions [\#2212](https://github.com/nlohmann/json/pull/2212) ([nlohmann](https://github.com/nlohmann))
+- Fix Clang-Tidy warnings [\#2211](https://github.com/nlohmann/json/pull/2211) ([nlohmann](https://github.com/nlohmann))
+- Simple ordered\_json that works on all supported compilers [\#2206](https://github.com/nlohmann/json/pull/2206) ([gatopeich](https://github.com/gatopeich))
+- Use unsigned indizies for array index in json pointer [\#2203](https://github.com/nlohmann/json/pull/2203) ([t-b](https://github.com/t-b))
+- Add option to not rely on Internet connectivity during test stage [\#2202](https://github.com/nlohmann/json/pull/2202) ([nlohmann](https://github.com/nlohmann))
+- Serialize floating-point numbers with 32 bit when possible \(MessagePack\) [\#2201](https://github.com/nlohmann/json/pull/2201) ([nlohmann](https://github.com/nlohmann))
+- Fix consistency in function `int\_to\_string\(\)` [\#2193](https://github.com/nlohmann/json/pull/2193) ([dota17](https://github.com/dota17))
+- Fix issue\#1275 [\#2181](https://github.com/nlohmann/json/pull/2181) ([dota17](https://github.com/dota17))
+- C++20 support by removing swap specialization [\#2176](https://github.com/nlohmann/json/pull/2176) ([gracicot](https://github.com/gracicot))
+- Feat/explicit conversion operator [\#1559](https://github.com/nlohmann/json/pull/1559) ([theodelrieu](https://github.com/theodelrieu))
+
 ## [v3.8.0](https://github.com/nlohmann/json/releases/tag/v3.8.0) (2020-06-14)
 
 [Full Changelog](https://github.com/nlohmann/json/compare/v3.7.3...v3.8.0)
 
 - sorry delete this issue, i'm stupid [\#2187](https://github.com/nlohmann/json/issues/2187)
 - Append to a std::nlohmann::json type [\#2186](https://github.com/nlohmann/json/issues/2186)
-- Object properties should not be re-sorted alphabetically [\#2179](https://github.com/nlohmann/json/issues/2179)
 - Some troubles to compile the last revision [\#2177](https://github.com/nlohmann/json/issues/2177)
 - ​\#​ Top level CMakeLists.txt​
 ​project​\(FOO\)
@@ -34,7 +150,6 @@ All notable changes to this project will be documented in this file. This projec
 - test-cbor fails [\#2154](https://github.com/nlohmann/json/issues/2154)
 - Accessing array inside array syntax?  [\#2151](https://github.com/nlohmann/json/issues/2151)
 - Best way to catch errors when querying json [\#2150](https://github.com/nlohmann/json/issues/2150)
-- Adding a value to an existing json puts it at the beginning instead of the end [\#2149](https://github.com/nlohmann/json/issues/2149)
 - JSON Data Mapping Key-Value from other Key-Value [\#2148](https://github.com/nlohmann/json/issues/2148)
 - Conflicts with std \<any\> compiling with GCC 10 [\#2146](https://github.com/nlohmann/json/issues/2146)
 - Incorrect CMake FetchContent example [\#2142](https://github.com/nlohmann/json/issues/2142)
@@ -64,7 +179,6 @@ All notable changes to this project will be documented in this file. This projec
 - Can't ad an object in another objet [\#2101](https://github.com/nlohmann/json/issues/2101)
 - Implicit conversion causes "cannot use operator\[\] with a string argument with string" [\#2098](https://github.com/nlohmann/json/issues/2098)
 - C++20: char8\_t [\#2097](https://github.com/nlohmann/json/issues/2097)
-- UTF8  [\#2095](https://github.com/nlohmann/json/issues/2095)
 - Compilation issues when included in project [\#2094](https://github.com/nlohmann/json/issues/2094)
 - string value with null character causes infinite loop [\#2093](https://github.com/nlohmann/json/issues/2093)
 - corrupted size vs. prev\_size \(aborted\) [\#2092](https://github.com/nlohmann/json/issues/2092)
@@ -91,7 +205,6 @@ All notable changes to this project will be documented in this file. This projec
 - Bug: returning reference to local temporary object [\#2064](https://github.com/nlohmann/json/issues/2064)
 - Allow to use non strict parsing [\#2063](https://github.com/nlohmann/json/issues/2063)
 - Crashing on json::at [\#2062](https://github.com/nlohmann/json/issues/2062)
-- Add support for JSONC [\#2061](https://github.com/nlohmann/json/issues/2061)
 - How to convert a const std::vector\<char8\_t\> message to a json, to be able to parse it and extract information from it? Can you point to any examples? [\#2058](https://github.com/nlohmann/json/issues/2058)
 - Nice library [\#2057](https://github.com/nlohmann/json/issues/2057)
 - json.hpp:15372:22: error: expected unqualified-id if \(not std::isfinite\(x\)\): Started getting this bug after updating my XCode [\#2056](https://github.com/nlohmann/json/issues/2056)
@@ -197,7 +310,6 @@ All notable changes to this project will be documented in this file. This projec
 - typo in a comment [\#1903](https://github.com/nlohmann/json/issues/1903)
 - Watch JSON variables in Debug [\#1902](https://github.com/nlohmann/json/issues/1902)
 - does Json sdk cares about dfc dfd utf8 issue? [\#1901](https://github.com/nlohmann/json/issues/1901)
-- Compilation failure using Clang on Windows [\#1898](https://github.com/nlohmann/json/issues/1898)
 - Allow multiple line string value in JSON [\#1897](https://github.com/nlohmann/json/issues/1897)
 - Writing map to json file  [\#1896](https://github.com/nlohmann/json/issues/1896)
 - Small documentation mistake [\#1895](https://github.com/nlohmann/json/issues/1895)
@@ -253,7 +365,6 @@ All notable changes to this project will be documented in this file. This projec
 - Serialize big data in json [\#1828](https://github.com/nlohmann/json/issues/1828)
 - Backslash '\' in value causes exception [\#1827](https://github.com/nlohmann/json/issues/1827)
 - from\_json for non default constructible class with dependency injection [\#1819](https://github.com/nlohmann/json/issues/1819)
-- Fail to build when including json.hpp as a system include [\#1818](https://github.com/nlohmann/json/issues/1818)
 - Semi-frequent timeouts in `test-unicode\_all` with 3.6.1 \(aarch64\) [\#1816](https://github.com/nlohmann/json/issues/1816)
 - input\_adapter not user extensible [\#1813](https://github.com/nlohmann/json/issues/1813)
 - crash at json::destroy on android  [\#1812](https://github.com/nlohmann/json/issues/1812)
@@ -322,7 +433,6 @@ All notable changes to this project will be documented in this file. This projec
 - Fix issue\#1719 [\#2044](https://github.com/nlohmann/json/pull/2044) ([dota17](https://github.com/dota17))
 - Add missing testcase about NaN in unit-constructor1.cpp [\#2043](https://github.com/nlohmann/json/pull/2043) ([dota17](https://github.com/dota17))
 - Templatize basic\_json constructor from json\_ref [\#2034](https://github.com/nlohmann/json/pull/2034) ([ArtemSarmini](https://github.com/ArtemSarmini))
-- Replace deprecated std::is\_pod [\#2033](https://github.com/nlohmann/json/pull/2033) ([nlohmann](https://github.com/nlohmann))
 - fix \#1982:json\_pointer.contains\(\) exception is incorrectly raised [\#2019](https://github.com/nlohmann/json/pull/2019) ([dota17](https://github.com/dota17))
 - catch exceptions for json\_pointer : ..../+99 [\#1990](https://github.com/nlohmann/json/pull/1990) ([dota17](https://github.com/dota17))
 - fix warnings in serializer.hpp for VS2019 [\#1969](https://github.com/nlohmann/json/pull/1969) ([dota17](https://github.com/dota17))
@@ -369,7 +479,6 @@ All notable changes to this project will be documented in this file. This projec
 - json class should have a get\_or member function [\#1823](https://github.com/nlohmann/json/issues/1823)
 - NLOHMANN\_JSON\_SERIALIZE\_ENUM macro capture's json objects by value [\#1822](https://github.com/nlohmann/json/issues/1822)
 - Parse fails when number literals start with zero [\#1820](https://github.com/nlohmann/json/issues/1820)
-- Parsing string into json doesn't preserve the order correctly. [\#1817](https://github.com/nlohmann/json/issues/1817)
 - Weird behaviour of `contains` with `json\_pointer` [\#1815](https://github.com/nlohmann/json/issues/1815)
 - strange behaviour with json\_pointer and .contains\(\) [\#1811](https://github.com/nlohmann/json/issues/1811)
 - Can \#1695 be re-opened? [\#1808](https://github.com/nlohmann/json/issues/1808)
@@ -426,7 +535,6 @@ All notable changes to this project will be documented in this file. This projec
 - CMake not correctly finding the configuration package for 3.7.0  [\#1721](https://github.com/nlohmann/json/issues/1721)
 - name typo in the "spack package management" section of README.md [\#1720](https://github.com/nlohmann/json/issues/1720)
 - How to add json to another json? [\#1718](https://github.com/nlohmann/json/issues/1718)
-- How can I save json object in file in order?  [\#1717](https://github.com/nlohmann/json/issues/1717)
 - json::parse\(\) ubsan regression with v3.7.0 [\#1716](https://github.com/nlohmann/json/issues/1716)
 - What I am doing wrong?!? [\#1714](https://github.com/nlohmann/json/issues/1714)
 - Potential memory leak detected by Valgrind [\#1713](https://github.com/nlohmann/json/issues/1713)
@@ -633,8 +741,6 @@ All notable changes to this project will be documented in this file. This projec
 - Added to\_string and added basic tests [\#1585](https://github.com/nlohmann/json/pull/1585) ([Macr0Nerd](https://github.com/Macr0Nerd))
 - Regression tests for MSVC [\#1570](https://github.com/nlohmann/json/pull/1570) ([nickaein](https://github.com/nickaein))
 - Fix/1511 [\#1555](https://github.com/nlohmann/json/pull/1555) ([theodelrieu](https://github.com/theodelrieu))
-- Remove C++17 extension warning from clang; \#1535 [\#1551](https://github.com/nlohmann/json/pull/1551) ([heavywatal](https://github.com/heavywatal))
-- moved from Catch to doctest for unit tests [\#1439](https://github.com/nlohmann/json/pull/1439) ([onqtam](https://github.com/onqtam))
 
 ## [v3.6.1](https://github.com/nlohmann/json/releases/tag/v3.6.1) (2019-03-20)
 
@@ -658,7 +764,6 @@ All notable changes to this project will be documented in this file. This projec
 - how to precision to four decimal for double when use to\_json [\#1519](https://github.com/nlohmann/json/issues/1519)
 - error parse [\#1518](https://github.com/nlohmann/json/issues/1518)
 - Compile error: template argument deduction/substitution failed [\#1515](https://github.com/nlohmann/json/issues/1515)
-- Support for Comments [\#1513](https://github.com/nlohmann/json/issues/1513)
 - std::complex type [\#1510](https://github.com/nlohmann/json/issues/1510)
 - CBOR byte string support [\#1509](https://github.com/nlohmann/json/issues/1509)
 - Compilation error getting a std::pair\<\> on latest VS 2017 compiler [\#1506](https://github.com/nlohmann/json/issues/1506)
@@ -738,6 +843,7 @@ All notable changes to this project will be documented in this file. This projec
 - Implicit type conversion error on MSVC [\#1333](https://github.com/nlohmann/json/issues/1333)
 - NuGet Package [\#1132](https://github.com/nlohmann/json/issues/1132)
 
+- Remove C++17 extension warning from clang; \#1535 [\#1551](https://github.com/nlohmann/json/pull/1551) ([heavywatal](https://github.com/heavywatal))
 - Change macros to numeric\_limits [\#1514](https://github.com/nlohmann/json/pull/1514) ([naszta](https://github.com/naszta))
 - fix GCC 7.1.1 - 7.2.1 on CentOS [\#1496](https://github.com/nlohmann/json/pull/1496) ([lieff](https://github.com/lieff))
 - Update Buckaroo instructions in README.md [\#1495](https://github.com/nlohmann/json/pull/1495) ([njlr](https://github.com/njlr))
@@ -753,6 +859,7 @@ All notable changes to this project will be documented in this file. This projec
 - remove extra semicolon from readme [\#1451](https://github.com/nlohmann/json/pull/1451) ([Afforix](https://github.com/Afforix))
 - attempt to fix \#1445, flush buffer in serializer::dump\_escaped in UTF8\_REJECT case. [\#1446](https://github.com/nlohmann/json/pull/1446) ([scinart](https://github.com/scinart))
 - Use C++11 features supported by CMake 3.1. [\#1441](https://github.com/nlohmann/json/pull/1441) ([iwanders](https://github.com/iwanders))
+- moved from Catch to doctest for unit tests [\#1439](https://github.com/nlohmann/json/pull/1439) ([onqtam](https://github.com/onqtam))
 - :rotating\_light: fixed unused variable warning [\#1435](https://github.com/nlohmann/json/pull/1435) ([pboettch](https://github.com/pboettch))
 - allow push\_back\(\) and pop\_back\(\) calls on json\_pointer [\#1434](https://github.com/nlohmann/json/pull/1434) ([pboettch](https://github.com/pboettch))
 - Add instructions about using nlohmann/json with the conda package manager [\#1430](https://github.com/nlohmann/json/pull/1430) ([nicoddemus](https://github.com/nicoddemus))
@@ -824,7 +931,6 @@ All notable changes to this project will be documented in this file. This projec
 - Comparisons between large unsigned and negative signed integers [\#1295](https://github.com/nlohmann/json/issues/1295)
 - CMake alias to `nlohmann::json` [\#1291](https://github.com/nlohmann/json/issues/1291)
 - Release zips without tests [\#1285](https://github.com/nlohmann/json/issues/1285)
-- Suggestion to improve value\(\) accessors with respect to move semantics [\#1275](https://github.com/nlohmann/json/issues/1275)
 - separate object\_t::key\_type from basic\_json::key\_type, and use an allocator which returns object\_t::key\_type [\#1274](https://github.com/nlohmann/json/issues/1274)
 - Is there a nice way to associate external values with json elements? [\#1256](https://github.com/nlohmann/json/issues/1256)
 - Delete by json\_pointer [\#1248](https://github.com/nlohmann/json/issues/1248)
@@ -1023,7 +1129,6 @@ All notable changes to this project will be documented in this file. This projec
 - can't not parse "\\“ string [\#1123](https://github.com/nlohmann/json/issues/1123)
 -  if  json file  contain Internationalization   chars   ,  get  exception [\#1122](https://github.com/nlohmann/json/issues/1122)
 - How to use a json::iterator dereferenced value in code? [\#1120](https://github.com/nlohmann/json/issues/1120)
-- clang compiler: error : unknown type name 'not' [\#1119](https://github.com/nlohmann/json/issues/1119)
 - Disable implicit conversions from json to std::initializer\_list\<T\> for any T [\#1118](https://github.com/nlohmann/json/issues/1118)
 - Implicit conversions to complex types can lead to surprising and confusing errors [\#1116](https://github.com/nlohmann/json/issues/1116)
 - How can I write from\_json for a complex datatype that is not default constructible? [\#1115](https://github.com/nlohmann/json/issues/1115)
@@ -1035,7 +1140,6 @@ All notable changes to this project will be documented in this file. This projec
 - JSON representation for floating point values has too many digits [\#1109](https://github.com/nlohmann/json/issues/1109)
 - Not working for classes containing "\_declspec\(dllimport\)" in their declaration [\#1108](https://github.com/nlohmann/json/issues/1108)
 - Get keys from json object [\#1107](https://github.com/nlohmann/json/issues/1107)
-- dump\(\) without alphabetical order [\#1106](https://github.com/nlohmann/json/issues/1106)
 - Cannot deserialize types using std::ratio [\#1105](https://github.com/nlohmann/json/issues/1105)
 -  i want to learn json [\#1104](https://github.com/nlohmann/json/issues/1104)
 - Type checking during compile [\#1103](https://github.com/nlohmann/json/issues/1103)
@@ -1182,6 +1286,7 @@ All notable changes to this project will be documented in this file. This projec
 
 - Allowing for user-defined string type in lexer/parser [\#1009](https://github.com/nlohmann/json/pull/1009) ([nlohmann](https://github.com/nlohmann))
 - dump to alternative string type, as defined in basic\_json template [\#1006](https://github.com/nlohmann/json/pull/1006) ([agrianius](https://github.com/agrianius))
+- Fix memory leak during parser callback [\#1001](https://github.com/nlohmann/json/pull/1001) ([nlohmann](https://github.com/nlohmann))
 - fixed misprinted condition detected by PVS Studio. [\#992](https://github.com/nlohmann/json/pull/992) ([bogemic](https://github.com/bogemic))
 - Fix/basic json conversion [\#986](https://github.com/nlohmann/json/pull/986) ([theodelrieu](https://github.com/theodelrieu))
 - Make integration section concise [\#981](https://github.com/nlohmann/json/pull/981) ([wla80](https://github.com/wla80))
@@ -1205,7 +1310,6 @@ All notable changes to this project will be documented in this file. This projec
 - \[Request\] Macro generating from\_json\(\) and to\_json\(\) [\#895](https://github.com/nlohmann/json/issues/895)
 - basic\_json::value throws exception instead of returning default value [\#871](https://github.com/nlohmann/json/issues/871)
 
-- Fix memory leak during parser callback [\#1001](https://github.com/nlohmann/json/pull/1001) ([nlohmann](https://github.com/nlohmann))
 - Fix constraints on from\_json\(CompatibleArrayType\) [\#969](https://github.com/nlohmann/json/pull/969) ([theodelrieu](https://github.com/theodelrieu))
 - Make coveralls watch the include folder [\#957](https://github.com/nlohmann/json/pull/957) ([theodelrieu](https://github.com/theodelrieu))
 - Fix links in README.md [\#955](https://github.com/nlohmann/json/pull/955) ([patrikhuber](https://github.com/patrikhuber))
@@ -1219,7 +1323,6 @@ All notable changes to this project will be documented in this file. This projec
 
 [Full Changelog](https://github.com/nlohmann/json/compare/v3.0.1...3.1.0)
 
-- Order of the elements in JSON object [\#952](https://github.com/nlohmann/json/issues/952)
 - I have a proposal [\#949](https://github.com/nlohmann/json/issues/949)
 - VERSION define\(s\) [\#948](https://github.com/nlohmann/json/issues/948)
 - v3.0.1 compile error in icc 16.0.4 [\#947](https://github.com/nlohmann/json/issues/947)
@@ -1421,7 +1524,6 @@ All notable changes to this project will be documented in this file. This projec
 - Project's name is too generic and hard to search for [\#730](https://github.com/nlohmann/json/issues/730)
 - Visual Studio 2015 IntelliTrace problems [\#729](https://github.com/nlohmann/json/issues/729)
 - How to erase nested objects inside other objects? [\#728](https://github.com/nlohmann/json/issues/728)
-- How to prevent alphabetical sorting of data? [\#727](https://github.com/nlohmann/json/issues/727)
 - Serialization for CBOR [\#726](https://github.com/nlohmann/json/issues/726)
 - Using json Object as value in a map [\#725](https://github.com/nlohmann/json/issues/725)
 - std::regex and nlohmann::json value [\#724](https://github.com/nlohmann/json/issues/724)
@@ -1469,7 +1571,6 @@ All notable changes to this project will be documented in this file. This projec
 - could this json lib work on windows? [\#664](https://github.com/nlohmann/json/issues/664)
 - How does from\_json work? [\#662](https://github.com/nlohmann/json/issues/662)
 - insert\(or merge\) object should replace same key , not ignore [\#661](https://github.com/nlohmann/json/issues/661)
-- Why is an object ordering values by Alphabetical Order?  [\#660](https://github.com/nlohmann/json/issues/660)
 - Parse method doesn't handle newlines. [\#659](https://github.com/nlohmann/json/issues/659)
 - Compilation "note" on GCC 6 ARM [\#658](https://github.com/nlohmann/json/issues/658)
 - Adding additional push\_back/operator+= rvalue overloads for JSON object [\#657](https://github.com/nlohmann/json/issues/657)
@@ -1519,7 +1620,6 @@ All notable changes to this project will be documented in this file. This projec
 - Use of the binary type in CBOR and Message Pack [\#601](https://github.com/nlohmann/json/issues/601)
 - Newbie issue: how does one convert a map in Json back to std::map? [\#600](https://github.com/nlohmann/json/issues/600)
 - Plugin system [\#599](https://github.com/nlohmann/json/issues/599)
-- Feature request: Comments [\#597](https://github.com/nlohmann/json/issues/597)
 - Using custom types for scalars? [\#596](https://github.com/nlohmann/json/issues/596)
 - Issues with the arithmetic in iterator and reverse iterator [\#593](https://github.com/nlohmann/json/issues/593)
 - not enough examples [\#592](https://github.com/nlohmann/json/issues/592)
@@ -1561,7 +1661,6 @@ All notable changes to this project will be documented in this file. This projec
 - Ambiguous compare operators with clang-5.0 [\#547](https://github.com/nlohmann/json/issues/547)
 - Using tsl::ordered\_map [\#546](https://github.com/nlohmann/json/issues/546)
 - Compiler support errors are inconvenient [\#544](https://github.com/nlohmann/json/issues/544)
-- Head Elements Sorting [\#543](https://github.com/nlohmann/json/issues/543)
 - Duplicate symbols error happens while to\_json/from\_json method implemented inside entity definition header file [\#542](https://github.com/nlohmann/json/issues/542)
 - consider adding a bool json::is\_valid\(std::string const&\) non-member function [\#541](https://github.com/nlohmann/json/issues/541)
 - Help request [\#539](https://github.com/nlohmann/json/issues/539)
@@ -1730,7 +1829,6 @@ All notable changes to this project will be documented in this file. This projec
 - Getting std::invalid\_argument: stream error when following example [\#429](https://github.com/nlohmann/json/issues/429)
 - Forward declare-only header? [\#427](https://github.com/nlohmann/json/issues/427)
 - Implicit conversion from array to object [\#425](https://github.com/nlohmann/json/issues/425)
-- Automatic ordered JSON [\#424](https://github.com/nlohmann/json/issues/424)
 - error C4996: 'strerror' when reading file [\#422](https://github.com/nlohmann/json/issues/422)
 - Get an error - JSON pointer must be empty or begin with '/' [\#421](https://github.com/nlohmann/json/issues/421)
 - size parameter for parse\(\) [\#419](https://github.com/nlohmann/json/issues/419)
@@ -1739,7 +1837,6 @@ All notable changes to this project will be documented in this file. This projec
 - comparing to 0 literal [\#414](https://github.com/nlohmann/json/issues/414)
 - Single char converted to ASCII code instead of string [\#413](https://github.com/nlohmann/json/issues/413)
 - How to know if a string  was parsed as utf-8? [\#406](https://github.com/nlohmann/json/issues/406)
-- Heap-buffer-overflow \(OSS-Fuzz issue 342\) [\#405](https://github.com/nlohmann/json/issues/405)
 - Overloaded += to add objects to an array makes no sense? [\#404](https://github.com/nlohmann/json/issues/404)
 - Finding a value in an array [\#399](https://github.com/nlohmann/json/issues/399)
 - add release information in static function [\#397](https://github.com/nlohmann/json/issues/397)
@@ -1769,6 +1866,7 @@ All notable changes to this project will be documented in this file. This projec
 - Use-of-uninitialized-value \(OSS-Fuzz issue 347\) [\#409](https://github.com/nlohmann/json/issues/409)
 - Heap-buffer-overflow \(OSS-Fuzz issue 344\) [\#408](https://github.com/nlohmann/json/issues/408)
 - Heap-buffer-overflow \(OSS-Fuzz issue 343\) [\#407](https://github.com/nlohmann/json/issues/407)
+- Heap-buffer-overflow \(OSS-Fuzz issue 342\) [\#405](https://github.com/nlohmann/json/issues/405)
 - strerror throwing error in compiler VS2015 [\#403](https://github.com/nlohmann/json/issues/403)
 - json::parse of std::string being underlined by Visual Studio [\#402](https://github.com/nlohmann/json/issues/402)
 - Explicitly getting string without .dump\(\)  [\#401](https://github.com/nlohmann/json/issues/401)
@@ -1800,7 +1898,6 @@ All notable changes to this project will be documented in this file. This projec
 - Allow for forward declaring nlohmann::json [\#381](https://github.com/nlohmann/json/issues/381)
 - Bug in overflow detection when parsing integers [\#380](https://github.com/nlohmann/json/issues/380)
 - A unique name to mention the library? [\#377](https://github.com/nlohmann/json/issues/377)
-- Support for comments. [\#376](https://github.com/nlohmann/json/issues/376)
 - Non-unique keys in objects. [\#375](https://github.com/nlohmann/json/issues/375)
 - Request: binary serialization/deserialization [\#358](https://github.com/nlohmann/json/issues/358)
 
@@ -1824,7 +1921,6 @@ All notable changes to this project will be documented in this file. This projec
 - json::parse on failed stream gets stuck [\#366](https://github.com/nlohmann/json/issues/366)
 - Performance improvements [\#365](https://github.com/nlohmann/json/issues/365)
 - 'to\_string' is not a member of 'std'  [\#364](https://github.com/nlohmann/json/issues/364)
-- Optional comment support. [\#363](https://github.com/nlohmann/json/issues/363)
 - Crash in dump\(\) from a static object [\#359](https://github.com/nlohmann/json/issues/359)
 - json::parse\(...\) vs json j; j.parse\(...\) [\#357](https://github.com/nlohmann/json/issues/357)
 - Hi, is there any method to dump  json to string with the insert order rather than alphabets [\#356](https://github.com/nlohmann/json/issues/356)
@@ -1902,7 +1998,6 @@ All notable changes to this project will be documented in this file. This projec
 [Full Changelog](https://github.com/nlohmann/json/compare/v2.0.2...v2.0.3)
 
 - warning C4706: assignment within conditional expression [\#295](https://github.com/nlohmann/json/issues/295)
-- Strip comments / Minify [\#294](https://github.com/nlohmann/json/issues/294)
 - Q: Is it possible to build json tree from already UTF8 encoded values? [\#293](https://github.com/nlohmann/json/issues/293)
 - Equality operator results in array when assigned object [\#292](https://github.com/nlohmann/json/issues/292)
 - Support for integers not from the range \[-\(2\*\*53\)+1, \(2\*\*53\)-1\] in parser [\#291](https://github.com/nlohmann/json/issues/291)
@@ -2077,7 +2172,6 @@ All notable changes to this project will be documented in this file. This projec
 - error: unterminated raw string [\#109](https://github.com/nlohmann/json/issues/109)
 - vector\<json\> copy constructor really weird [\#108](https://github.com/nlohmann/json/issues/108)
 - \[clang-3.6.2\] string/sstream with number to json issue [\#107](https://github.com/nlohmann/json/issues/107)
-- maintaining order of keys during iteration [\#106](https://github.com/nlohmann/json/issues/106)
 - object field accessors [\#103](https://github.com/nlohmann/json/issues/103)
 - v8pp and json [\#95](https://github.com/nlohmann/json/issues/95)
 - Wishlist [\#65](https://github.com/nlohmann/json/issues/65)
diff --git a/doc/Doxyfile b/doc/Doxyfile
index 56a41d13..e6207fb0 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -5,7 +5,7 @@
 #---------------------------------------------------------------------------
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "JSON for Modern C++"
-PROJECT_NUMBER         = 3.8.0
+PROJECT_NUMBER         = 3.9.0
 PROJECT_BRIEF          =
 PROJECT_LOGO           =
 OUTPUT_DIRECTORY       = .
diff --git a/doc/examples/README.link b/doc/examples/README.link
index 0589c59d..786b27be 100644
--- a/doc/examples/README.link
+++ b/doc/examples/README.link
@@ -1 +1 @@
-<a target="_blank" href="https://wandbox.org/permlink/EezQxM0Nzi8tTUEe"><b>online</b></a>
\ No newline at end of file
+<a target="_blank" href="https://wandbox.org/permlink/shE8T6phAQiEzAad"><b>online</b></a>
\ No newline at end of file
diff --git a/doc/examples/meta.output b/doc/examples/meta.output
index eb66a35f..ffadccbe 100644
--- a/doc/examples/meta.output
+++ b/doc/examples/meta.output
@@ -10,8 +10,8 @@
     "url": "https://github.com/nlohmann/json",
     "version": {
         "major": 3,
-        "minor": 8,
+        "minor": 9,
         "patch": 0,
-        "string": "3.8.0"
+        "string": "3.9.0"
     }
 }
diff --git a/doc/index.md b/doc/index.md
index fd5cf88d..e990e7a3 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -332,4 +332,4 @@ Note that this table only lists those exceptions thrown due to the type. For ins
 @author [Niels Lohmann](http://nlohmann.me)
 @see https://github.com/nlohmann/json to download the source code
 
-@version 3.8.0
+@version 3.9.0
diff --git a/doc/json.gif b/doc/json.gif
index c9557b91..d3dfb91c 100644
Binary files a/doc/json.gif and b/doc/json.gif differ
diff --git a/include/nlohmann/json.hpp b/include/nlohmann/json.hpp
index 50d83349..3b122b0c 100644
--- a/include/nlohmann/json.hpp
+++ b/include/nlohmann/json.hpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@@ -31,7 +31,7 @@ SOFTWARE.
 #define INCLUDE_NLOHMANN_JSON_HPP_
 
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 8
+#define NLOHMANN_JSON_VERSION_MINOR 9
 #define NLOHMANN_JSON_VERSION_PATCH 0
 
 #include <algorithm> // all_of, find, for_each
@@ -1052,7 +1052,7 @@ class basic_json
                     object = nullptr;  // silence warning, see #821
                     if (JSON_HEDLEY_UNLIKELY(t == value_t::null))
                     {
-                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.8.0")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.9.0")); // LCOV_EXCL_LINE
                     }
                     break;
                 }
diff --git a/meson.build b/meson.build
index ffc7b09f..6f95c9b6 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('nlohmann_json',
     'cpp',
-    version : '3.8.0',
+    version : '3.9.0',
     license : 'MIT',
 )
 
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 336afd11..6a0f47ab 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@@ -31,7 +31,7 @@ SOFTWARE.
 #define INCLUDE_NLOHMANN_JSON_HPP_
 
 #define NLOHMANN_JSON_VERSION_MAJOR 3
-#define NLOHMANN_JSON_VERSION_MINOR 8
+#define NLOHMANN_JSON_VERSION_MINOR 9
 #define NLOHMANN_JSON_VERSION_PATCH 0
 
 #include <algorithm> // all_of, find, for_each
@@ -17440,7 +17440,7 @@ class basic_json
                     object = nullptr;  // silence warning, see #821
                     if (JSON_HEDLEY_UNLIKELY(t == value_t::null))
                     {
-                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.8.0")); // LCOV_EXCL_LINE
+                        JSON_THROW(other_error::create(500, "961c151d2e87f2686a955a9be24d316f1362bf21 3.9.0")); // LCOV_EXCL_LINE
                     }
                     break;
                 }
diff --git a/test/src/fuzzer-driver_afl.cpp b/test/src/fuzzer-driver_afl.cpp
index a14ceaac..a9368ca9 100644
--- a/test/src/fuzzer-driver_afl.cpp
+++ b/test/src/fuzzer-driver_afl.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a driver for American Fuzzy Lop (afl-fuzz). It relies on
diff --git a/test/src/fuzzer-parse_bson.cpp b/test/src/fuzzer-parse_bson.cpp
index 9a43d203..1d26a776 100644
--- a/test/src/fuzzer-parse_bson.cpp
+++ b/test/src/fuzzer-parse_bson.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/fuzzer-parse_cbor.cpp b/test/src/fuzzer-parse_cbor.cpp
index 43061e06..7d312306 100644
--- a/test/src/fuzzer-parse_cbor.cpp
+++ b/test/src/fuzzer-parse_cbor.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/fuzzer-parse_json.cpp b/test/src/fuzzer-parse_json.cpp
index 1b193f6d..4bc54bab 100644
--- a/test/src/fuzzer-parse_json.cpp
+++ b/test/src/fuzzer-parse_json.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/fuzzer-parse_msgpack.cpp b/test/src/fuzzer-parse_msgpack.cpp
index c771c546..8d17b5d9 100644
--- a/test/src/fuzzer-parse_msgpack.cpp
+++ b/test/src/fuzzer-parse_msgpack.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/fuzzer-parse_ubjson.cpp b/test/src/fuzzer-parse_ubjson.cpp
index dd30c36e..3d99abbe 100644
--- a/test/src/fuzzer-parse_ubjson.cpp
+++ b/test/src/fuzzer-parse_ubjson.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (fuzz test support)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 This file implements a parser test suitable for fuzz testing. Given a byte
diff --git a/test/src/unit-algorithms.cpp b/test/src/unit-algorithms.cpp
index 8700e6fe..d59c090c 100644
--- a/test/src/unit-algorithms.cpp
+++ b/test/src/unit-algorithms.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-allocator.cpp b/test/src/unit-allocator.cpp
index 233b5539..58f4c63a 100644
--- a/test/src/unit-allocator.cpp
+++ b/test/src/unit-allocator.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-alt-string.cpp b/test/src/unit-alt-string.cpp
index 93618273..d5131040 100644
--- a/test/src/unit-alt-string.cpp
+++ b/test/src/unit-alt-string.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-assert_macro.cpp b/test/src/unit-assert_macro.cpp
index 9996394f..b2a71be9 100644
--- a/test/src/unit-assert_macro.cpp
+++ b/test/src/unit-assert_macro.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-bson.cpp b/test/src/unit-bson.cpp
index c5a71a3d..42dae1f2 100644
--- a/test/src/unit-bson.cpp
+++ b/test/src/unit-bson.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-capacity.cpp b/test/src/unit-capacity.cpp
index 0942e5ea..cbe0d6b0 100644
--- a/test/src/unit-capacity.cpp
+++ b/test/src/unit-capacity.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-cbor.cpp b/test/src/unit-cbor.cpp
index 0d55de85..0a8dbf6f 100644
--- a/test/src/unit-cbor.cpp
+++ b/test/src/unit-cbor.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-class_const_iterator.cpp b/test/src/unit-class_const_iterator.cpp
index 38fc52a0..f75c4831 100644
--- a/test/src/unit-class_const_iterator.cpp
+++ b/test/src/unit-class_const_iterator.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-class_iterator.cpp b/test/src/unit-class_iterator.cpp
index b83ce38f..0a85e7ad 100644
--- a/test/src/unit-class_iterator.cpp
+++ b/test/src/unit-class_iterator.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-class_lexer.cpp b/test/src/unit-class_lexer.cpp
index d8304ccf..0f544d55 100644
--- a/test/src/unit-class_lexer.cpp
+++ b/test/src/unit-class_lexer.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-class_parser.cpp b/test/src/unit-class_parser.cpp
index a17d342c..2c93a753 100644
--- a/test/src/unit-class_parser.cpp
+++ b/test/src/unit-class_parser.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-comparison.cpp b/test/src/unit-comparison.cpp
index 7f8b4df2..b0984a5b 100644
--- a/test/src/unit-comparison.cpp
+++ b/test/src/unit-comparison.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-concepts.cpp b/test/src/unit-concepts.cpp
index fbb51838..49f2f865 100644
--- a/test/src/unit-concepts.cpp
+++ b/test/src/unit-concepts.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-constructor1.cpp b/test/src/unit-constructor1.cpp
index 8e63d0ce..70f52fd2 100644
--- a/test/src/unit-constructor1.cpp
+++ b/test/src/unit-constructor1.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-constructor2.cpp b/test/src/unit-constructor2.cpp
index a7152939..a7bf0e50 100644
--- a/test/src/unit-constructor2.cpp
+++ b/test/src/unit-constructor2.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-convenience.cpp b/test/src/unit-convenience.cpp
index eb8929c1..41955b3f 100644
--- a/test/src/unit-convenience.cpp
+++ b/test/src/unit-convenience.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-conversions.cpp b/test/src/unit-conversions.cpp
index 7ab0e9a3..32e15ace 100644
--- a/test/src/unit-conversions.cpp
+++ b/test/src/unit-conversions.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-deserialization.cpp b/test/src/unit-deserialization.cpp
index dbc81cb3..66556617 100644
--- a/test/src/unit-deserialization.cpp
+++ b/test/src/unit-deserialization.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-element_access1.cpp b/test/src/unit-element_access1.cpp
index 64ed2ed2..a619b249 100644
--- a/test/src/unit-element_access1.cpp
+++ b/test/src/unit-element_access1.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-element_access2.cpp b/test/src/unit-element_access2.cpp
index 970ab00c..4abf3dba 100644
--- a/test/src/unit-element_access2.cpp
+++ b/test/src/unit-element_access2.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-hash.cpp b/test/src/unit-hash.cpp
index 186cad88..ea35300f 100644
--- a/test/src/unit-hash.cpp
+++ b/test/src/unit-hash.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-inspection.cpp b/test/src/unit-inspection.cpp
index 7a1acb3e..02502e07 100644
--- a/test/src/unit-inspection.cpp
+++ b/test/src/unit-inspection.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-items.cpp b/test/src/unit-items.cpp
index 8043fb39..a3f808b2 100644
--- a/test/src/unit-items.cpp
+++ b/test/src/unit-items.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-iterators1.cpp b/test/src/unit-iterators1.cpp
index 36e52e91..d389b9f6 100644
--- a/test/src/unit-iterators1.cpp
+++ b/test/src/unit-iterators1.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-iterators2.cpp b/test/src/unit-iterators2.cpp
index 87ab593a..c3378e0d 100644
--- a/test/src/unit-iterators2.cpp
+++ b/test/src/unit-iterators2.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-json_patch.cpp b/test/src/unit-json_patch.cpp
index f82e34b0..23f59b0f 100644
--- a/test/src/unit-json_patch.cpp
+++ b/test/src/unit-json_patch.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-json_pointer.cpp b/test/src/unit-json_pointer.cpp
index 1cca62ec..7d320bcc 100644
--- a/test/src/unit-json_pointer.cpp
+++ b/test/src/unit-json_pointer.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-large_json.cpp b/test/src/unit-large_json.cpp
index 455af49f..175b0cd6 100644
--- a/test/src/unit-large_json.cpp
+++ b/test/src/unit-large_json.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-merge_patch.cpp b/test/src/unit-merge_patch.cpp
index 4bab7828..c664f8f3 100644
--- a/test/src/unit-merge_patch.cpp
+++ b/test/src/unit-merge_patch.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-meta.cpp b/test/src/unit-meta.cpp
index 081f4b00..48ef35c1 100644
--- a/test/src/unit-meta.cpp
+++ b/test/src/unit-meta.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@@ -43,9 +43,9 @@ TEST_CASE("version information")
         CHECK(j["url"] == "https://github.com/nlohmann/json");
         CHECK(j["version"] == json(
         {
-            {"string", "3.8.0"},
+            {"string", "3.9.0"},
             {"major", 3},
-            {"minor", 8},
+            {"minor", 9},
             {"patch", 0}
         }));
 
diff --git a/test/src/unit-modifiers.cpp b/test/src/unit-modifiers.cpp
index 018ae2da..4f5b5729 100644
--- a/test/src/unit-modifiers.cpp
+++ b/test/src/unit-modifiers.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-msgpack.cpp b/test/src/unit-msgpack.cpp
index e53a6d59..42089555 100644
--- a/test/src/unit-msgpack.cpp
+++ b/test/src/unit-msgpack.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-noexcept.cpp b/test/src/unit-noexcept.cpp
index fa40ccbc..4ed0f709 100644
--- a/test/src/unit-noexcept.cpp
+++ b/test/src/unit-noexcept.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-ordered_json.cpp b/test/src/unit-ordered_json.cpp
index 2918e442..0c8e7154 100644
--- a/test/src/unit-ordered_json.cpp
+++ b/test/src/unit-ordered_json.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-pointer_access.cpp b/test/src/unit-pointer_access.cpp
index 1113d202..c353c17c 100644
--- a/test/src/unit-pointer_access.cpp
+++ b/test/src/unit-pointer_access.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-readme.cpp b/test/src/unit-readme.cpp
index e9193cf0..729ee954 100644
--- a/test/src/unit-readme.cpp
+++ b/test/src/unit-readme.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-reference_access.cpp b/test/src/unit-reference_access.cpp
index 69f65102..9cbc7aea 100644
--- a/test/src/unit-reference_access.cpp
+++ b/test/src/unit-reference_access.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-regression.cpp b/test/src/unit-regression.cpp
index d70114ee..223466a4 100644
--- a/test/src/unit-regression.cpp
+++ b/test/src/unit-regression.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-serialization.cpp b/test/src/unit-serialization.cpp
index e7051d88..2308dd2a 100644
--- a/test/src/unit-serialization.cpp
+++ b/test/src/unit-serialization.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-testsuites.cpp b/test/src/unit-testsuites.cpp
index facf30c3..f5e0ec10 100644
--- a/test/src/unit-testsuites.cpp
+++ b/test/src/unit-testsuites.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-to_chars.cpp b/test/src/unit-to_chars.cpp
index 8853b199..386c4cc2 100644
--- a/test/src/unit-to_chars.cpp
+++ b/test/src/unit-to_chars.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-ubjson.cpp b/test/src/unit-ubjson.cpp
index 7e1a841f..3c72ddbb 100644
--- a/test/src/unit-ubjson.cpp
+++ b/test/src/unit-ubjson.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-udt.cpp b/test/src/unit-udt.cpp
index f391fbdb..2374b3e3 100644
--- a/test/src/unit-udt.cpp
+++ b/test/src/unit-udt.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-udt_macro.cpp b/test/src/unit-udt_macro.cpp
index ce9810a0..45eeca2e 100644
--- a/test/src/unit-udt_macro.cpp
+++ b/test/src/unit-udt_macro.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-unicode.cpp b/test/src/unit-unicode.cpp
index fa219f5b..0b60b359 100644
--- a/test/src/unit-unicode.cpp
+++ b/test/src/unit-unicode.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-user_defined_input.cpp b/test/src/unit-user_defined_input.cpp
index 45c3d055..967f9c06 100644
--- a/test/src/unit-user_defined_input.cpp
+++ b/test/src/unit-user_defined_input.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit-wstring.cpp b/test/src/unit-wstring.cpp
index 884a3209..2ebe99fb 100644
--- a/test/src/unit-wstring.cpp
+++ b/test/src/unit-wstring.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/test/src/unit.cpp b/test/src/unit.cpp
index 6cd45a5f..b0b20d79 100644
--- a/test/src/unit.cpp
+++ b/test/src/unit.cpp
@@ -1,7 +1,7 @@
 /*
     __ _____ _____ _____
  __|  |   __|     |   | |  JSON for Modern C++ (test suite)
-|  |  |__   |  |  | | | |  version 3.8.0
+|  |  |__   |  |  | | | |  version 3.9.0
 |_____|_____|_____|_|___|  https://github.com/nlohmann/json
 
 Licensed under the MIT License <http://opensource.org/licenses/MIT>.
diff --git a/wsjcpp.yml b/wsjcpp.yml
index 32027a43..629ae388 100644
--- a/wsjcpp.yml
+++ b/wsjcpp.yml
@@ -2,7 +2,7 @@ wsjcpp_version: "v0.1.1"
 cmake_minimum_required: "3.0"
 cmake_cxx_standard: "11"
 name: "nlohmann/json"
-version: "v3.7.3"
+version: "v3.9.0"
 description: "JSON for Modern C++"
 issues: "https://github.com/nlohmann/json/issues"
 keywords: