diff --git a/web/index.php b/web/index.php
index 91a426f..a1f5ccf 100644
--- a/web/index.php
+++ b/web/index.php
@@ -2,6 +2,15 @@
 ////////////////////////////Common head
 $cache_time = 30;
 $OJ_CACHE_SHARE = false;
+
+// Auto git pull on homepage visit (at most once per 60 seconds)
+$git_pull_lock = '/tmp/hustoj_git_pull.lock';
+if (!file_exists($git_pull_lock) || (time() - filemtime($git_pull_lock)) > 60) {
+    touch($git_pull_lock);
+    $repo_dir = dirname(__DIR__);
+    exec("cd " . escapeshellarg($repo_dir) . " && git pull > /tmp/hustoj_git_pull.log 2>&1 &");
+}
+
 require_once( './include/cache_start.php' );
 require_once( './include/db_info.inc.php' );
 require_once( './include/memcache.php' );