diff --git a/bin/cli.js b/bin/cli.js
index 21a4bf0..b12564f 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -101,7 +101,7 @@ async function main() {
   if (serverOk) {
     try {
       if (!process.env.MCP_AUTO_OPEN_DISABLED) {
-        open(`http://localhost:${CLIENT_PORT}`);
+        open(`http://127.0.0.1:${CLIENT_PORT}`);
       }
       await spawnPromise("node", [inspectorClientPath], {
         env: { ...process.env, PORT: CLIENT_PORT },