diff --git a/.travis.yml b/.travis.yml
index 0da3abe6..30631ea8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ os:
   - linux
   - osx
 
+osx_image: xcode9.4
+
 addons:
   apt:
     packages: