diff --git a/.travis.yml b/.travis.yml
index 30f84f4..5dd18cf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,12 @@
 script: bundle exec rake spec
 
+env: JRUBY_OPTS="-X+O"
+
 rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
+  - jruby-19mode
 
 notifications:
   email: false