diff --git a/.travis.yml b/.travis.yml
index acac01e..aa60d3a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -41,6 +41,7 @@ matrix:
     # OSX Clang
     - os: osx
       osx_image: xcode8
+      ruby: 2.3
       env:
         BUILD_TYPE=Release
         BIN_DIR=bin
@@ -48,6 +49,7 @@ matrix:
         brew install cmake
     - os: osx
       osx_image: xcode8
+      ruby: 2.3
       env:
         BUILD_TYPE=Debug
         BIN_DIR=debug