diff --git a/.travis.yml b/.travis.yml
index 5b5e3fe..3980085 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,7 +11,7 @@ matrix:
           sources:
              - ubuntu-toolchain-r-test
           packages:
-             - g++-5
+             - g++-5=5.4.1-2ubuntu1~12.04
       env: COMPILER=g++-5 CXXSTD=11
     - compiler: gcc
       addons: