diff --git a/.travis.yml b/.travis.yml
index c052f66..e8929a4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,7 @@ node_js:
   - "6"
   - "7"
   - "8"
+  - "9"
 
 before_install:
   - '[ "${TRAVIS_NODE_VERSION}" = "0.8" ] && npm install -g npm@~1.4.0 || true'