diff --git a/.travis.yml b/.travis.yml
index 5e4c576..202aa51 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ node_js:
 - '0.10'
 - '0.12'
 - '2.0.0'
+- '4'
 before_install:
   - npm install -g bower
   - export DISPLAY=:99.0