diff --git a/public_html/index.php b/public_html/index.php
index af0a781..9c5c549 100644
--- a/public_html/index.php
+++ b/public_html/index.php
@@ -49,7 +49,7 @@ if (isset($_COOKIE['username'])) {
 }
 
 // redirect to login
-if ( !isset($_SESSION['user_id']) && ($page !== 'login' && $page !== 'register') ) {
+if ( !isset($_COOKIE['username']) && ($page !== 'login' && $page !== 'register') ) {
     header('Location: index.php?page=login');
     exit();
 }
diff --git a/public_html/templates/menu.php b/public_html/templates/menu.php
index 4131410..65d8428 100644
--- a/public_html/templates/menu.php
+++ b/public_html/templates/menu.php
@@ -2,13 +2,13 @@
 <div class="menu-container">
     <ul class="menu-left">
         <li><a href="index.php">home</a></li>
-<?php if ( isset($_SESSION['user_id']) ) { ?>
+<?php if ( isset($_SESSION['username']) ) { ?>
         <li><a href="?page=config">config</a></li>
 <?php } ?>
     </ul>
 
     <ul class="menu-right">
-<?php if ( isset($_SESSION['user_id']) ) { ?>
+<?php if ( isset($_SESSION['username']) ) { ?>
         <li><a href="?page=profile"><?= $user ?></a></li>
         <li><a href="?page=logout">logout</a></li>
 <?php } else { ?>