diff --git a/.travis.yml b/.travis.yml
index b5dffa60..b7add675 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 sudo: false
 language: node_js
 node_js:
-  - "4"
   - "6"
   - "8"
   - "10"
diff --git a/package.json b/package.json
index a25ae7c5..af4b3d38 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "test": "nyc grunt mocha-and-karma"
   },
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=6"
   },
   "dependencies": {
     "async": "^2.0.1",