diff --git a/.travis.yml b/.travis.yml
index 784e99e..8560886 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,8 @@
 language: node_js
 node_js:
+  - 0.6
+  - 0.8
   - 0.10
   - 0.12
+  - 4.0
+  - 5.0