diff --git a/.travis.yml b/.travis.yml
index 90f7805..02a02fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ env:
   - NODE_VERSION="6"
   - NODE_VERSION="7"
   - NODE_VERSION="8"
+  - NODE_VERSION="9"
 
 # keep this blank to make sure there are no before_install steps
 before_install:
diff --git a/appveyor.yml b/appveyor.yml
index ad698e4..3c79528 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,5 +1,6 @@
 environment:
   matrix:
+    - nodejs_version: '9'
     - nodejs_version: '8'
     - nodejs_version: '7'
     - nodejs_version: '6'