diff --git a/.travis.yml b/.travis.yml
index f713c5b..32d9400 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 sudo: false
 node_js:
+  - "9"
   - "8"
   - "6"
-  - "4"
diff --git a/appveyor.yml b/appveyor.yml
index ce6811b..01785be 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,8 +1,8 @@
 environment:
   matrix:
+    - nodejs_version: "9"
     - nodejs_version: "8"
     - nodejs_version: "6"
-    - nodejs_version: "4"
 
 platform:
   - x64
@@ -17,5 +17,5 @@ test_script:
 
 matrix:
   fast_finish: true
-  
+
 build: off