diff --git a/v2rayN/v2rayN/HttpProxyHandler/HttpWebServerB.cs b/v2rayN/v2rayN/HttpProxyHandler/HttpWebServerB.cs
index 576b6e4a..6b21dcda 100644
--- a/v2rayN/v2rayN/HttpProxyHandler/HttpWebServerB.cs
+++ b/v2rayN/v2rayN/HttpProxyHandler/HttpWebServerB.cs
@@ -28,6 +28,7 @@ namespace v2rayN.HttpProxyHandler
             catch (Exception ex)
             {
                 Utils.SaveLog(ex.Message, ex);
+                throw;
             }
 
             Utils.SaveLog("WebserverB running...");