diff --git a/AutoWeightServer/Center/DeviceCenter.cs b/AutoWeightServer/Center/DeviceCenter.cs
index ed865d6..e0aac3f 100644
--- a/AutoWeightServer/Center/DeviceCenter.cs
+++ b/AutoWeightServer/Center/DeviceCenter.cs
@@ -7,6 +7,7 @@ using EC.AutoWeightServer.Model.Config;
 using EC.AutoWeightServer.UI;
 using EC.AutoWeightServer.UI.UC;
 using EC.Entity.Transport;
+using EC.Utils;
 using System;
 using System.Collections.Generic;
 using System.IO;