diff --git a/assets/img/bing.php b/assets/img/bing.php
index 7f4c930..e4e6837 100644
--- a/assets/img/bing.php
+++ b/assets/img/bing.php
@@ -6,7 +6,7 @@
  */
 
 $str=file_get_contents('http://cn.bing.com/HPImageArchive.aspx?idx=0&n=1');
-if(preg_match("/<url>(.+?)<\/url>/ies",$str,$matches)){
+if(preg_match("/<url>(.+?)<\/url>/is",$str,$matches)){
 $imgurl='http://cn.bing.com'.$matches[1];
 }
 if($imgurl){