diff --git a/.travis.yml b/.travis.yml
index cbfc5fd..ade0b07 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,13 @@
 matrix:
   include:
     - os: osx
-      osx_image: xcode9.2
-      env: SWIFT_VERSION=4.0.3
-    - os: osx
-      osx_image: xcode9.4
-      env: SWIFT_VERSION=4.1
-    - os: osx
-      osx_image: xcode10
+      osx_image: xcode11.4
       env: SWIFT_VERSION=4.2
     - os: osx
-      osx_image: xcode10.2
+      osx_image: xcode11.4
       env: SWIFT_VERSION=5.0
-    - os: linux
-      env: SWIFT_VERSION=4.0.3
-    - os: linux
-      env: SWIFT_VERSION=4.1
     - os: linux
       env: SWIFT_VERSION=4.2
-    - os: linux
-      env: SWIFT_VERSION=4.2.3
     - os: linux
       env: SWIFT_VERSION=5.0
 language: generic