diff --git a/web/app/controllers/group.php b/web/app/controllers/group.php
index 7a82a71..f71c23d 100644
--- a/web/app/controllers/group.php
+++ b/web/app/controllers/group.php
@@ -177,14 +177,14 @@
 		};
 		$remove_assignment_form->runAtServer();
 
-        $announcement_form = new UOJForm('announcement_form');
-        $announcement_form->addVTextArea('announcement_content', '公告', $group['announcement'], 
+		$announcement_form = new UOJForm('announcement_form');
+		$announcement_form->addVTextArea('announcement_content', '公告', $group['announcement'], 
 			function ($x) {
 				return '';
 			},
 			null
 		);
-        $announcement_form->submit_button_config['align'] = 'compressed';
+		$announcement_form->submit_button_config['align'] = 'compressed';
 		$announcement_form->submit_button_config['text'] = '更新公告';
 		$announcement_form->handle = function() {
 			global $group_id, $myUser;
diff --git a/web/app/views/page-header.php b/web/app/views/page-header.php
index 22f41eb..29f3c2b 100644
--- a/web/app/views/page-header.php
+++ b/web/app/views/page-header.php
@@ -295,7 +295,7 @@
 					<?php foreach ($groups as $group): ?>
 						<?php
 							$group_detail = DB::selectFirst("select * from groups where id = {$group['id']}");
-							$group_announcement = $group_detail['announcement'];
+						$group_announcement = $group_detail['announcement'];
 						?>
 						<li class="list-group-item">
 							<a href="<?= HTML::url('/group/'.$group['id']) ?>">