diff --git a/src/desktop/join.html b/src/desktop/join.html
index 66c8da9..f71c6d9 100644
--- a/src/desktop/join.html
+++ b/src/desktop/join.html
@@ -65,6 +65,7 @@
 		<script src="https://cdn.jsdelivr.net/npm/jquery-validation@1.19.5/dist/jquery.validate.min.js" integrity="sha256-JwUksNJ6/R07ZiLRoXbGeNrtlFZMFDKX4hemPiHOmCA=" crossorigin="anonymous"></script>
 		<script>
 			const FORM_URL = 'http://192.168.100.82:3000/invitation/add_commander';
+			const CHECK_URL = 'http://192.168.100.82:3000/invitation/check_is_commander';
 			$().ready(function() {
 				function getUrlParam(name) {
             var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
@@ -146,7 +147,7 @@
 					headers.append("Content-Type", "application/json");
 					try {
 						let data = await fetch(
-							FORM_URL,
+							CHECK_URL,
 							{ 
 								method: 'POST', 
 								headers,
@@ -159,7 +160,7 @@
 							return res.json()
 						})
 						if (!data.errcode) {
-							return true
+							return data.result === 1
 						} else {
 							return false
 						}