diff --git a/.travis.yml b/.travis.yml
index a18efef..91cea5e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,18 +1,10 @@
 matrix:
   include:
     - os: osx
-      osx_image: xcode8.3
-      env: SWIFT_VERSION=3.1.1
-    - os: osx
-      osx_image: xcode9
-      env: SWIFT_VERSION=4.0
-    - os: osx
-      osx_image: xcode9.1
-      env: SWIFT_VERSION=4.0
+      osx_image: xcode9.3
+      env: SWIFT_VERSION=4.1
     - os: linux
-      env: SWIFT_VERSION=3.1.1
-    - os: linux
-      env: SWIFT_VERSION=4.0
+      env: SWIFT_VERSION=4.1
 language: generic
 sudo: required
 dist: trusty