diff --git a/package.json b/package.json
index d53a4a1..8edb6c6 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   "preferGlobal": false,
   "bin": {},
   "engines": {
-    "node": ">= 4.0.0",
+    "node": ">= 6.0.0",
     "iojs": ">= 1.0.0"
   },
   "main": "src/index.js",