diff --git a/web/gitpull.php b/web/gitpull.php
index 95d551a..211b4d7 100644
--- a/web/gitpull.php
+++ b/web/gitpull.php
@@ -21,13 +21,12 @@ $src_path = '/home/judge/src';
 $output = [];
 $return_code = -1;
 
-if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-    $cmd = "echo " . escapeshellarg($SUDO_PASSWORD)
-         . " | sudo -S -u " . escapeshellarg($SUDO_USER)
-         . " git -C " . escapeshellarg($src_path)
-         . " pull 2>&1";
-    exec($cmd, $output, $return_code);
-}
+// 打开页面或点击重试按钮时均执行更新
+$cmd = "echo " . escapeshellarg($SUDO_PASSWORD)
+     . " | su -c " . escapeshellarg("git -C " . $src_path . " pull")
+     . " " . escapeshellarg($SUDO_USER)
+     . " 2>&1";
+exec($cmd, $output, $return_code);
 
 $show_title = "Git Pull - " . $OJ_NAME;
 require("template/".$OJ_TEMPLATE."/header.php");
@@ -39,19 +38,19 @@ require("template/".$OJ_TEMPLATE."/header.php");
         <div class="content">服务器更新 <small style="font-size:0.6em; color:#888;">(git pull <?php echo htmlspecialchars($src_path); ?>)</small></div>
     </h2>
 
-    <?php if ($_SERVER['REQUEST_METHOD'] === 'POST'): ?>
-        <div class="ui <?php echo $return_code === 0 ? 'success' : 'error'; ?> message">
-            <div class="header"><?php echo $return_code === 0 ? '更新成功' : '更新失败（返回码：' . $return_code . '）'; ?></div>
-            <pre style="margin-top:8px; white-space:pre-wrap; word-break:break-all;"><?php echo htmlspecialchars(implode("\n", $output)); ?></pre>
-        </div>
-    <?php endif; ?>
+    <div class="ui <?php echo $return_code === 0 ? 'success' : 'error'; ?> message">
+        <div class="header"><?php echo $return_code === 0 ? '更新成功' : '更新失败（返回码：' . $return_code . '）'; ?></div>
+        <pre style="margin-top:8px; white-space:pre-wrap; word-break:break-all;"><?php echo htmlspecialchars(implode("\n", $output)); ?></pre>
+    </div>
 
-    <form method="post" action="gitpull.php" style="margin-top:16px;">
-        <button type="submit" class="ui primary button">
-            <i class="refresh icon"></i> 立即执行 git pull
-        </button>
+    <div style="margin-top:16px;">
+        <?php if ($return_code !== 0): ?>
+        <a class="ui primary button" href="gitpull.php">
+            <i class="refresh icon"></i> 重试 git pull
+        </a>
+        <?php endif; ?>
         <a class="ui button" href="javascript:history.back()">返回</a>
-    </form>
+    </div>
 </div>
 
 <?php require("template/".$OJ_TEMPLATE."/footer.php"); ?>