diff --git a/.travis.yml b/.travis.yml
index 91cea5e..9240617 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,15 @@
 matrix:
   include:
     - os: osx
-      osx_image: xcode9.3
+      osx_image: xcode9.4
       env: SWIFT_VERSION=4.1
+    - os: osx
+      osx_image: xcode10
+      env: SWIFT_VERSION=4.2
     - os: linux
       env: SWIFT_VERSION=4.1
+    - os: linux
+      env: SWIFT_VERSION=4.2
 language: generic
 sudo: required
 dist: trusty