diff --git a/.travis.yml b/.travis.yml
index 3b7e574..70408b0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,7 @@ addons:
 cache:
   directories:
     - $HOME/.composer/cache
+    - $HOME/.npm
 
 php:
  - 5.6