diff --git a/.travis.yml b/.travis.yml
index 013a33c..4096f18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,5 +18,8 @@ rvm:
   - 1.9.3
   - "2.0"
   - "2.1"
+  - "2.2"
+  - "2.3.3"
+  - "2.4.0"
   - ruby-head
 script: bundle exec rspec