diff --git a/.travis.yml b/.travis.yml
index 33f1afa63e..3e69f37fe0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,7 @@ language: node_js
 
 # https://github.com/nodejs/LTS
 node_js:
+  - '9'
   - '8'
   - '6'
   - '4'