diff --git a/IRaCIS.Core.API/Startup.cs b/IRaCIS.Core.API/Startup.cs
index e3238d68..7bf6254c 100644
--- a/IRaCIS.Core.API/Startup.cs
+++ b/IRaCIS.Core.API/Startup.cs
@@ -237,7 +237,7 @@ namespace IRaCIS.Core.API
 
                 endpoints.MapControllers();
 
-                endpoints.MapHub<UploadHub>("/UploadHub")/*.RequireCors(t=>t.WithOrigins(new string[] {"null"}).AllowAnyMethod().AllowAnyHeader().AllowCredentials())*/;
+                endpoints.MapHub<UploadHub>("/UploadHub");
             });
 
         }
diff --git a/IRaCIS.Core.API/appsettings.Staging.json b/IRaCIS.Core.API/appsettings.Staging.json
index 2bdaadaf..52e93a6e 100644
--- a/IRaCIS.Core.API/appsettings.Staging.json
+++ b/IRaCIS.Core.API/appsettings.Staging.json
@@ -18,8 +18,6 @@
     "OpenLoginLimit": true
 
   },
-
-
   "SystemEmailSendConfig": {
     "Port": 25,
     "Host": "smtp.qiye.aliyun.com",