diff --git a/README.md b/README.md
index e8a3c56..0dcf112 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Memoization, but good. Works with functions of an arbitrary and/or variable numb
 
 ## Requirements
 
-- [Node.js](https://nodejs.org/) 4+
+- [Node.js](https://nodejs.org/) 6+
 
 ## Usage
 
diff --git a/package.json b/package.json
index 968f2fa..a601d2f 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
 	"module": "./dist/index.es.js",
 	"files": ["dist"],
 	"engines": {
-		"node": ">=8"
+		"node": ">=6"
 	},
 	"repository": {
 		"type": "git",