diff --git a/server.go b/server.go
index 48c7fa2..a4c29c2 100644
--- a/server.go
+++ b/server.go
@@ -166,8 +166,13 @@ func (server *Server) Start() error {
 			err = server.httpserver.Serve(proxyListener)
 		}
 
-		logger.Error("server.httpserver.Serve err :", err)
-		if err != http.ErrServerClosed {
+		if err != nil {
+			if errors.Is(err, http.ErrServerClosed) {
+				logger.Println("server.httpserver is closed normally")
+				return nil
+			}
+
+			logger.Error("server.httpserver.Serve err :", err)
 			return err
 		}
 	}