diff --git a/FastGithub.ReverseProxy/KestrelServerOptionsExtensions.cs b/FastGithub.ReverseProxy/KestrelServerOptionsExtensions.cs
index f4871c9..52a33ba 100644
--- a/FastGithub.ReverseProxy/KestrelServerOptionsExtensions.cs
+++ b/FastGithub.ReverseProxy/KestrelServerOptionsExtensions.cs
@@ -184,10 +184,10 @@ namespace FastGithub
             if (string.IsNullOrEmpty(host) == false)
             {
                 yield return host;
+                yield break;
             }
 
             var globalPropreties = IPGlobalProperties.GetIPGlobalProperties();
-
             yield return globalPropreties.HostName;
             foreach (var item in globalPropreties.GetUnicastAddresses())
             {