diff --git a/server/server.go b/server/server.go
index 83e8fc6..344988a 100644
--- a/server/server.go
+++ b/server/server.go
@@ -8,21 +8,27 @@ import (
 	"git.loafle.net/overflow/overflow_gateway_websocket/config"
 )
 
-func New(sh ServerHandler) cwf.Server {
+func New(sh ServerHandler) Server {
 	if nil == config.Config.Server {
 		logging.Logger().Panic(fmt.Sprintf("Gateway Websocket: Config of server is not initialized"))
 	}
 
-	sh.Name = config.Config.Server.Name
-	sh.Concurrency = config.Config.Server.Concurrency
-	sh.MaxStopWaitTime = config.Config.Server.MaxStopWaitTime
+	shs := sh.(*ServerHandlers)
 
-	sh.HandshakeTimeout = config.Config.Websocket.HandshakeTimeout
-	sh.ReadBufferSize = config.Config.Websocket.ReadBufferSize
-	sh.WriteBufferSize = config.Config.Websocket.WriteBufferSize
-	sh.EnableCompression = config.Config.Websocket.EnableCompression
+	shs.Name = config.Config.Server.Name
+	shs.Concurrency = config.Config.Server.Concurrency
+	shs.MaxStopWaitTime = config.Config.Server.MaxStopWaitTime
 
-	s := cwf.New(sh)
+	shs.HandshakeTimeout = config.Config.Websocket.HandshakeTimeout
+	shs.ReadBufferSize = config.Config.Websocket.ReadBufferSize
+	shs.WriteBufferSize = config.Config.Websocket.WriteBufferSize
+	shs.EnableCompression = config.Config.Websocket.EnableCompression
+
+	s := cwf.New(shs)
 
 	return s
 }
+
+type Server interface {
+	cwf.Server
+}