diff --git a/.travis.yml b/.travis.yml
index ebd9cd4..c95ae81 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,11 @@ rvm:
   - 1.9.2
   - 1.9.3
   - 2.0.0
+  - 2.1
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
   - ruby-head
   - jruby-18mode
   - jruby-19mode