diff --git a/.travis.yml b/.travis.yml
index cfd8f25..2ad9c69 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
+  - ruby-head
   - jruby-18mode
   - jruby-19mode
   - rbx-18mode