diff --git a/.travis.yml b/.travis.yml
index 5d4ef19..ef77eb5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,10 @@ language: ruby
 rvm:
  - 1.9.2
  - 1.9.3
+ - 2.0.0
  - jruby-19mode # JRuby in 1.9 mode
+ - rbx-19mode
+ - ruby-head
 
 gemfile:
  - gemfiles/Gemfile