diff --git a/MifareOneTool/FormHTool.cs b/MifareOneTool/FormHTool.cs
index 2de8e32..3a1a23e 100644
--- a/MifareOneTool/FormHTool.cs
+++ b/MifareOneTool/FormHTool.cs
@@ -167,7 +167,7 @@ namespace MifareOneTool
             ofd.DefaultExt = ".mfd";
             ofd.Title = "请选择MFD文件保存位置及文件名";
             ofd.OverwritePrompt = true;
-            ofd.Filter = "MFD文件|*.mfd";
+            ofd.Filter = "MFD文件|*.mfd|DUMP文件|*.dump";
             if (ofd.ShowDialog() == DialogResult.OK)
             {
                 filename = ofd.FileName;