diff --git a/README.md b/README.md
index 330dc40..751fc7d 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,7 @@ jobs:
 
 ## Requirements
 
-- Node.js 18 or higher
+- Node.js 20 or higher
 - GitHub personal access token with `repo` scope
 - OpenAI API key for AI-powered features
 
diff --git a/package.json b/package.json
index d6a9276..4c709a3 100644
--- a/package.json
+++ b/package.json
@@ -21,6 +21,9 @@
     "README.md"
   ],
   "type": "module",
+  "engines": {
+    "node": ">=20"
+  },
   "main": "./build/index.js",
   "types": "./build/index.d.ts",
   "scripts": {