diff --git a/README.md b/README.md
index f8fe8a6..3b31dc2 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,7 @@ Also, check this out: [sefinek/Cloudflare-WAF-To-AbuseIPDB](https://github.com/s
 1. [Node.js + npm](https://nodejs.org)
 2. [PM2](https://www.npmjs.com/package/pm2) (`npm i pm2 -g`)
 3. [Git](https://git-scm.com)
+4. Ubuntu Server or Debian
 
 
 ## ✅ Features