diff --git a/filcnaplo_mobile_ui/lib/screens/navigation/navigation_screen.dart b/filcnaplo_mobile_ui/lib/screens/navigation/navigation_screen.dart
index a829763..b8d3d8f 100755
--- a/filcnaplo_mobile_ui/lib/screens/navigation/navigation_screen.dart
+++ b/filcnaplo_mobile_ui/lib/screens/navigation/navigation_screen.dart
@@ -171,9 +171,9 @@ class NavigationScreenState extends State<NavigationScreen>
   }
 
   @override
-  void didChangePlatformBrightness() {
+  void PlatformBrightness() {
     if (settings.theme == ThemeMode.system) {
-      Brightness? brightness = MediaQuery.of(context).platformBrightness;
+      Brightness? brightness = WidgetsBinding.instance.window.platformBrightness;
       Provider.of<ThemeModeObserver>(context, listen: false).changeTheme(
           brightness == Brightness.light ? ThemeMode.light : ThemeMode.dark);
     }