diff --git a/lib/pages/menu.dart b/lib/pages/menu.dart
index fe82cf4..7484b9d 100644
--- a/lib/pages/menu.dart
+++ b/lib/pages/menu.dart
@@ -116,7 +116,7 @@ class Menu extends StatefulWidget {
               name: "test",
               bytes: bytes,
               mimeType: MimeType.custom,
-              customMimeType: 'text/md'
+              customMimeType: 'MD',
               );
             final file = File(outputfile!);
             file.writeAsString(OpenFile.text);