diff --git a/.travis.yml b/.travis.yml
index 88353cd..2228c1a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 sudo: false
 language: php
+cache: npm
 php:
+- '5.6'
 - '5.5'
 - '5.4'
 before_install: