diff --git a/.travis.yml b/.travis.yml
index bbaba0c..7e8114d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,6 @@
 language: node_js
 
 node_js:
-  - '4'
   - '6'
   - '8'
   - '10'
diff --git a/package.json b/package.json
index a39699a..8fdcf86 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,6 @@
     ]
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   }
 }