diff --git a/.travis.yml b/.travis.yml
index 5410776..23b51eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: node_js
 node_js:
   - 7
   - 8
+  - 9
 cache:
   directories:
     - wrk/bin