diff --git a/.travis.yml b/.travis.yml
index c9215b6..e62e256 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -174,25 +174,25 @@ matrix:
 
     - os: osx
       compiler: clang++
-      osx_image: xcode7
+      osx_image: xcode7.3
       env:
         - CXX_COMPILER=clang++ CC_COMPILER=clang
 
     - os: osx
       compiler: clang++
-      osx_image: xcode8
+      osx_image: xcode8.3
       env:
         - CXX_COMPILER=clang++ CC_COMPILER=clang
 
     - os: osx
       compiler: clang++
-      osx_image: xcode9
+      osx_image: xcode9.4
       env:
         - CXX_COMPILER=clang++ CC_COMPILER=clang
 
     - os: osx
       compiler: clang++
-      osx_image: xcode10
+      osx_image: xcode10.1
       env:
         - CXX_COMPILER=clang++ CC_COMPILER=clang