diff --git a/code/client/conn/conn.go b/code/client/conn/conn.go
index 1601af6..b6b3bdb 100644
--- a/code/client/conn/conn.go
+++ b/code/client/conn/conn.go
@@ -11,7 +11,6 @@ import (
 	"github.com/lwch/logging"
 	"github.com/lwch/natpass/code/client/global"
 	"github.com/lwch/natpass/code/network"
-	"github.com/lwch/natpass/code/network/encoding/proto"
 	"github.com/lwch/natpass/code/utils"
 	"github.com/lwch/runtime"
 )
@@ -82,7 +81,6 @@ func (conn *Conn) connect() error {
 		return err
 	}
 	cn := network.NewConn(dial)
-	cn.SetCodec(proto.New())
 	err = writeHandshake(cn, conn.cfg)
 	if err != nil {
 		logging.Error("write handshake: %v", err)
diff --git a/code/server/handler/handler.go b/code/server/handler/handler.go
index b81ae03..862ff32 100644
--- a/code/server/handler/handler.go
+++ b/code/server/handler/handler.go
@@ -8,7 +8,6 @@ import (
 
 	"github.com/lwch/logging"
 	"github.com/lwch/natpass/code/network"
-	"github.com/lwch/natpass/code/network/encoding/proto"
 	"github.com/lwch/natpass/code/server/global"
 )
 
@@ -50,7 +49,6 @@ func New(cfg *global.Configure) *Handler {
 // Handle main loop
 func (h *Handler) Handle(conn net.Conn) {
 	c := network.NewConn(conn)
-	c.SetCodec(proto.New())
 	var id string
 	defer func() {
 		if len(id) > 0 {