diff --git a/README.md b/README.md
index 4e8e729..5b46477 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ PS：为使用方便，以下函数没有对 `access_token` 进行缓存。对
 PHP版：
 
 ```php
-function send_to_wecom($text, $wecom_cid, $wecom_secret, $wecom_aid, $wecom_touid = '@all')
+function send_to_wecom($text, $wecom_cid, $wecom_aid, $wecom_secret,  $wecom_touid = '@all')
 {
     $info = @json_decode(file_get_contents("https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=".urlencode($wecom_cid)."&corpsecret=".urlencode($wecom_secret)), true);