diff --git a/B3WeChat/Utils/InOutMessageUtil.cs b/B3WeChat/Utils/InOutMessageUtil.cs
index 0680e80..8e6e9d8 100644
--- a/B3WeChat/Utils/InOutMessageUtil.cs
+++ b/B3WeChat/Utils/InOutMessageUtil.cs
@@ -166,7 +166,7 @@ namespace BWP.B3WeChat.Utils
 
     public static string GetJsApiSignature(string noncestr, string timestamp, string url)
     {
-      var origin = string.Format("jsapi_ticket={0}&=noncestr{1}&timestamp={2}&url={3}", GetJsApiTicket(),noncestr, timestamp, url);
+      var origin = string.Format("jsapi_ticket={0}&noncestr={1}&timestamp={2}&url={3}", GetJsApiTicket(), noncestr, timestamp, url);
       return FormsAuthentication.HashPasswordForStoringInConfigFile(origin, "SHA1").ToLower();
     }