diff --git a/src/MaaWpfGui/Helper/BitmapImageExtensions.cs b/src/MaaWpfGui/Helper/BitmapImageExtensions.cs
index c889bd1789..d57f03fbc6 100644
--- a/src/MaaWpfGui/Helper/BitmapImageExtensions.cs
+++ b/src/MaaWpfGui/Helper/BitmapImageExtensions.cs
@@ -1,9 +1,19 @@
+// <copyright file="BitmapImageExtensions.cs" company="MaaAssistantArknights">
+// MaaWpfGui - A part of the MaaCoreArknights project
+// Copyright (C) 2021 MistEO and Contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY
+// </copyright>
+
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Media.Imaging;
 
 namespace MaaWpfGui.Helper