diff --git a/README.md b/README.md
index 2b5b906..187f39c 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ $ npm install jssip-node-websocket --save
 ## Requirements
 
 * [jssip](http://jssip.net) >= `v2.0.0`
-* Node.js >= `v20.0.0`
+* Node.js >= `v4.0.0`
 
 
 ## Usage
diff --git a/package.json b/package.json
index fc8208d..0f696be 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
     "url": "https://github.com/versatica/jssip-node-websocket/issues"
   },
   "engines": {
-    "node": ">=20.0.0"
+    "node": ">=4.0.0"
   },
   "dependencies": {
     "debug": "^2.2.0",