diff --git a/.travis.yml b/.travis.yml
index 9eb1c7a0b..a423e4403 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@
 sudo: false
 
 language: ruby
+rvm:
+  - 2.2
 
 # for faster builds
 cache: bundler