diff --git a/web/demoset.php b/web/demoset.php
index 3025e0e..58b9550 100644
--- a/web/demoset.php
+++ b/web/demoset.php
@@ -1,15 +1,15 @@
 <?php require_once("./include/db_info.inc.php"); ?>
 
 <?php $show_title = "$MSG_PROBLEMS - $OJ_NAME"; ?>
-<?php include("template/$OJ_TEMPLATE/header.php"); ?>
+<?php require("template/$OJ_TEMPLATE/header.php"); ?>
 <div class="padding">
 
 
   <div class="container">
-    <?php include "demos/index.php"; ?>
+    <?php require "demos/index.php"; ?>
   </div>
 
 </div>
 
 </div>
-<?php include("template/$OJ_TEMPLATE/footer.php"); ?>  
\ No newline at end of file
+<?php require("template/$OJ_TEMPLATE/footer.php"); ?>  
\ No newline at end of file