diff --git a/.travis.yml b/.travis.yml
index 347d1c7..1b5dea7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,14 +1,18 @@
 sudo: false
 language: php
-cache: npm
+cache:
+  directories:
+  - node_modules
 php:
 - '5.6'
 - '5.5'
 - '5.4'
 
 before_install:
+  - npm cache clean
+  - npm prune
   - npm install -g bower gulp jscs
-  - npm install
+  - npm update
   - pyrus install pear/PHP_CodeSniffer
   - phpenv rehash