diff --git a/.travis.yml b/.travis.yml
index 9de48f9..0e3eecd 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,5 +9,9 @@ node_js:
   - "0.10"
   - "4.0"
   - "4.1"
+  - "4.4"
+  - "5.11"
+  - "6.0"
+  - "6.1"
 
 after_script: "npm install coveralls@2 && cat ./coverage/lcov.info | coveralls"