diff --git a/.travis.yml b/.travis.yml
index 893e584c..f685c765 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
+  - ruby-head
   - ree
   - jruby-18mode
   - jruby-19mode