diff --git a/.travis.yml b/.travis.yml
index dd338dd..83fdc1d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,6 @@
 language: node_js
 node_js:
-  - "4"
   - "6"
+  - "7"
   - "8"
+  - "9"