diff --git a/.travis.yml b/.travis.yml
index 9767bde..f43572f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ rvm:
   - 1.9.1
   - 1.9.2
   - 1.9.3
+  - jruby
   - rbx
   - rbx-2.0
   - ree
diff --git a/README.md b/README.md
index e1940da..9abee68 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,8 @@ implementations:
 * Ruby 1.8.7
 * Ruby 1.9.1
 * Ruby 1.9.2
-* [Rubinius](http://rubini.us)
+* [JRuby](http://www.jruby.org/)
+* [Rubinius](http://rubini.us/)
 * [Ruby Enterprise Edition](http://www.rubyenterpriseedition.com/)
 
 If something doesn't work on one of these interpreters, it should be considered