diff --git a/.travis.yml b/.travis.yml
index 297f734..ebe6275 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,9 @@ sudo: false
 language: node_js
 node_js:
   - 'stable'
-  - "0.11"
-  - "0.10"
+  - '6'
+  - '5'
+  - '4'
+  - '0.11'
+  - '0.10'
 script: npm run cover