diff --git a/.travis.yml b/.travis.yml
index a02388d96..66c1ef48a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,14 +3,21 @@ os: osx
 matrix:
   include:
   - osx_image: xcode9.3
+  env:
+    - MATRIX_EVAL=""
   - osx_image: xcode8.3
+  env:
+    - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"
   - osx_image: xcode7.3
+  env:
+    - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"
 
 before_install:
   - rvm install 2.2.6
   - gem install dropbox-deployment
   - brew update
   - brew bundle
+  - eval "${MATRIX_EVAL}"
   - env
 
 install: