diff --git a/flutter/lib/utils/multi_window_manager.dart b/flutter/lib/utils/multi_window_manager.dart
index 191152c86..fa35b4fe9 100644
--- a/flutter/lib/utils/multi_window_manager.dart
+++ b/flutter/lib/utils/multi_window_manager.dart
@@ -124,6 +124,9 @@ class RustDeskMultiWindowManager {
     bool withScreenRect,
   ) async {
     final windowController = await DesktopMultiWindow.createWindow(msg);
+    if (isWindows) {
+      windowController.setInitBackgroundColor(Colors.black);
+    }
     final windowId = windowController.windowId;
     if (!withScreenRect) {
       windowController
diff --git a/flutter/pubspec.lock b/flutter/pubspec.lock
index 6210b5399..6551bbb37 100644
--- a/flutter/pubspec.lock
+++ b/flutter/pubspec.lock
@@ -335,7 +335,7 @@ packages:
     description:
       path: "."
       ref: HEAD
-      resolved-ref: "0842f44d8644911f65a6b78be22474af0f8a9349"
+      resolved-ref: "519350f1f40746798299e94786197d058353bac9"
       url: "https://github.com/rustdesk-org/rustdesk_desktop_multi_window"
     source: git
     version: "0.1.0"