@@ -20,11 +20,14 @@
       dist: precise
       sudo: required
 
     # macOS
     - os: osx
-      osx_image: xcode9.3beta
+      osx_image: xcode9.4
+      language: objective-c
+    - os: osx
+      osx_image: xcode9.3
       language: objective-c
     - os: osx
       osx_image: xcode9.2
       language: objective-c
     - os: osx