diff --git a/.travis.yml b/.travis.yml
index eb1ab5d1..98cc33b1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - '4'
+  - '6'
 sudo: false
 script:
     - "npm run test"