diff --git a/.travis.yml b/.travis.yml
index 91c2256ae..39b73b95e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-osx_image:
+osx_image: xcode9.3
 language: objective-c
 script:
 - "./ios/travis-ci/build-ipa.sh"