diff --git a/.travis.yml b/.travis.yml
index 48e6685..c765ac1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
 before_script:
-  - sudo apt-get install libmozjs
+  - sudo apt-get install libmozjs-dev
   - gem install rspec