diff --git a/.travis.yml b/.travis.yml
index 56b41d9..9db3541 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,3 +11,6 @@ addons:
     - g++-4.8
 env:
   CXX=g++-4.8
+cache:
+  directories:
+    - node_modules