diff --git a/tool/crawler.php b/tool/crawler.php
index b8b86cb..0b565a3 100644
--- a/tool/crawler.php
+++ b/tool/crawler.php
@@ -74,7 +74,7 @@
   }
 
   foreach ($res as $k => $v) {
-    $rurl = $v['url'];
+    $rurl = mysqli_real_escape_string($mysqli, $v['url']);
     $rpid = null;
 
     if ($site = mysqli_prepare($mysqli, "SELECT id FROM website_page WHERE url = ?")) {