diff --git a/FastTunnel.Core/Forwarder/Kestrel/FastTunnelConnectionContext.cs b/FastTunnel.Core/Forwarder/Kestrel/FastTunnelConnectionContext.cs
index 5ac55f9..4723f77 100644
--- a/FastTunnel.Core/Forwarder/Kestrel/FastTunnelConnectionContext.cs
+++ b/FastTunnel.Core/Forwarder/Kestrel/FastTunnelConnectionContext.cs
@@ -11,6 +11,7 @@ using System.IO.Pipelines;
 using System.Text;
 using System.Threading.Tasks;
 using FastTunnel.Core.Models;
+using FastTunnel.Core.Protocol;
 using FastTunnel.Core.Server;
 using Microsoft.AspNetCore.Connections;
 using Microsoft.AspNetCore.Http.Features;
diff --git a/FastTunnel.Core/Forwarder/Kestrel/MiddleWare/SwapConnectionMiddleware.cs b/FastTunnel.Core/Forwarder/Kestrel/MiddleWare/SwapConnectionMiddleware.cs
index b98f1e8..e7bd940 100644
--- a/FastTunnel.Core/Forwarder/Kestrel/MiddleWare/SwapConnectionMiddleware.cs
+++ b/FastTunnel.Core/Forwarder/Kestrel/MiddleWare/SwapConnectionMiddleware.cs
@@ -15,6 +15,7 @@ using FastTunnel.Core.Extensions;
 using FastTunnel.Core.Forwarder.Kestrel;
 using FastTunnel.Core.Forwarder.MiddleWare;
 using FastTunnel.Core.Models.Massage;
+using FastTunnel.Core.Protocol;
 using FastTunnel.Core.Server;
 using Microsoft.AspNetCore.Connections;
 using Microsoft.AspNetCore.Connections.Features;
diff --git a/FastTunnel.Core/Forwarder/MiddleWare/DuplexPipeStream.cs b/FastTunnel.Core/Forwarder/MiddleWare/DuplexPipeStream.cs
index cb82bce..8acb3d2 100644
--- a/FastTunnel.Core/Forwarder/MiddleWare/DuplexPipeStream.cs
+++ b/FastTunnel.Core/Forwarder/MiddleWare/DuplexPipeStream.cs
@@ -13,6 +13,7 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using FastTunnel.Core.Extensions;
+using FastTunnel.Core.Forwarder.Kestrel.MiddleWare;
 
 namespace FastTunnel.Core.Forwarder.MiddleWare;