diff --git a/doc/Doxyfile b/doc/Doxyfile
index 8dfc0dcd..757a0103 100644
--- a/doc/Doxyfile
+++ b/doc/Doxyfile
@@ -281,7 +281,7 @@ SKIP_FUNCTION_MACROS   = YES
 # Configuration options related to external references
 #---------------------------------------------------------------------------
 TAGFILES               =
-GENERATE_TAGFILE       =
+GENERATE_TAGFILE       = html/nlohmann_json.tag
 ALLEXTERNALS           = NO
 EXTERNAL_GROUPS        = YES
 EXTERNAL_PAGES         = YES