diff --git a/.travis.yml b/.travis.yml
index 8083c7772..392c509ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,11 @@ dist: trusty
 sudo: false
 addons:
   apt:
+    sources:
+    - ubuntu-toolchain-r-test
     packages:
+    - gcc-5
+    - g++-5
     - libmysqlclient-dev
     - libperl-dev
     - libboost-dev