diff --git a/src/SuperSocket.Server/Host/HostBuilderExtensions.cs b/src/SuperSocket.Server/Host/HostBuilderExtensions.cs
index 14ae3ec0c..d425bcd76 100644
--- a/src/SuperSocket.Server/Host/HostBuilderExtensions.cs
+++ b/src/SuperSocket.Server/Host/HostBuilderExtensions.cs
@@ -6,9 +6,9 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using SuperSocket.ProtoBase;
-using SuperSocket.Server;
 using SuperSocket.Connection;
 using SuperSocket.Server.Abstractions;
+using SuperSocket.Server.Abstractions.Connections;
 using SuperSocket.Server.Abstractions.Host;
 using SuperSocket.Server.Abstractions.Session;
 using SuperSocket.Server.Connection;