diff --git a/.travis.yml b/.travis.yml
index 246af994..a315f893 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,11 @@
 language: node_js
 node_js:
   - "4"
+  - "5"
   - "6"
+  - "7"
   - "8"
+  - "9"
 script:
   - "npm run lint"
   - "npm run test-with-coverage"