diff --git a/.travis.yml b/.travis.yml
index 6fde9c4a..c89e6b05 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,13 @@ _native_job: &native_job
 
 language: shell
 
+os: linux
+
+dist: xenial
+
+# This is the default xcode version. The Xcode version defines what
+osx_image: xcode9.4
+
 jobs:
   - <<: *native_job
     name: default Ubuntu
@@ -15,3 +22,4 @@ jobs:
   - <<: *native_job
     name: MacOS
     os: osx
+