diff --git a/.travis.yml b/.travis.yml
index 706b6b23e97a29068f831f9c4d58d75063cb9278..6dfb6295ceb4683049360ff0447b07ad8e321942 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,8 @@ os:
   - linux
   - osx
 
+osx_image: xcode9
+
 cache:
     directories:
       - $HOME/.cache