diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9ad5699..b225713 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,7 +7,7 @@ Thanks for your interest in contributing! This guide explains how to get involve
 1. Fork the repository and clone it locally
 2. Install dependencies with `npm install`
 3. Run `npm run dev` to start both client and server in development mode
-4. Use the web UI at http://localhost:5173 to interact with the inspector
+4. Use the web UI at http://127.0.0.1:5173 to interact with the inspector
 
 ## Development Process & Pull Requests
 
diff --git a/bin/cli.js b/bin/cli.js
index 8e0318d..1b744ce 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -102,7 +102,7 @@ async function main() {
   await Promise.any([server, client, delay(2 * 1000)]);
   const portParam = SERVER_PORT === "3000" ? "" : `?proxyPort=${SERVER_PORT}`;
   console.log(
-    `\n🔍 MCP Inspector is up and running at http://localhost:${CLIENT_PORT}${portParam} 🚀`,
+    `\n🔍 MCP Inspector is up and running at http://127.0.0.1:${CLIENT_PORT}${portParam} 🚀`,
   );
 
   try {