diff --git a/.travis.yml b/.travis.yml
index db1addf..095fece 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,12 +1,14 @@
 language: ruby
 rvm:
   - 1.8.7
+  - ree
   - 1.9.2
   - 1.9.3
   - 2.0.0
-  - ree
+  - ruby-head
   - jruby-18mode
   - jruby-19mode
+  - jruby-head
   - rbx-18mode
   - rbx-19mode
 matrix: