diff --git a/common/exceptions/error.go b/common/exceptions/error.go
index a820b4c..b58da29 100644
--- a/common/exceptions/error.go
+++ b/common/exceptions/error.go
@@ -100,5 +100,5 @@ func IsTimeout(err error) bool {
 }
 
 type Handler interface {
-	HandleError(err error)
+	NewError(ctx context.Context, err error)
 }
diff --git a/common/udpnat/service.go b/common/udpnat/service.go
index 91cabf0..1dfc938 100644
--- a/common/udpnat/service.go
+++ b/common/udpnat/service.go
@@ -87,7 +87,7 @@ func (s *Service[T]) NewContextPacket(ctx context.Context, key T, buffer *buf.Bu
 		go func() {
 			err := s.handler.NewPacketConnection(ctx, c, metadata)
 			if err != nil {
-				s.handler.HandleError(err)
+				s.handler.NewError(ctx, err)
 			}
 			c.Close()
 			s.nat.Delete(key)
diff --git a/protocol/http/handshake.go b/protocol/http/handshake.go
index b0603d1..1838b49 100644
--- a/protocol/http/handshake.go
+++ b/protocol/http/handshake.go
@@ -19,10 +19,7 @@ import (
 	N "github.com/sagernet/sing/common/network"
 )
 
-type Handler interface {
-	N.TCPConnectionHandler
-	N.UDPConnectionHandler
-}
+type Handler = N.TCPConnectionHandler
 
 func HandleConnection(ctx context.Context, conn net.Conn, authenticator auth.Authenticator, handler Handler, metadata M.Metadata) error {
 	reader := std_bufio.NewReader(conn)