From 8de710bbe7cc0a882c507017791081a2913bea06 Mon Sep 17 00:00:00 2001
From: Niels Lohmann <mail@nlohmann.me>
Date: Thu, 10 Aug 2017 20:12:27 +0200
Subject: [PATCH] :construction_worker: added source for gcc

---
 .travis.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.travis.yml b/.travis.yml
index 3e544b66..7acc7cb4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -33,6 +33,7 @@ matrix:
     env: COMPILER=clang++-3.8
     addons:
       apt:
+        sources: ['ubuntu-toolchain-r-test']
         packages: ['g++-6', 'clang-3.8']
 
 ################