diff --git a/.travis.yml b/.travis.yml
index 6773b678..742e1ad7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,8 @@
 ---
 language: node_js
-node_js: 4
+node_js:
+  - 4
+  - 6
 cache:
   directories:
   - global-cli/node_modules