diff --git a/experimental/context_menus/lib/main.dart b/experimental/context_menus/lib/main.dart
index 6ca9af6aa..9978da272 100644
--- a/experimental/context_menus/lib/main.dart
+++ b/experimental/context_menus/lib/main.dart
@@ -62,6 +62,7 @@ class _MyAppState extends State<MyApp> {
       theme: ThemeData(
         primarySwatch: Colors.blue,
         platform: defaultTargetPlatform,
+        useMaterial3: true,
       ),
       initialRoute: '/',
       routes: <String, Widget Function(BuildContext)>{
diff --git a/experimental/context_menus/lib/platform_selector.dart b/experimental/context_menus/lib/platform_selector.dart
index ad486c5ca..48b444b54 100644
--- a/experimental/context_menus/lib/platform_selector.dart
+++ b/experimental/context_menus/lib/platform_selector.dart
@@ -27,7 +27,7 @@ class _PlatformSelectorState extends State<PlatformSelector> {
   @override
   Widget build(BuildContext context) {
     return SizedBox(
-      width: 160.0,
+      width: 170.0,
       child: DropdownButton<TargetPlatform>(
         value: defaultTargetPlatform,
         icon: const Icon(Icons.arrow_downward),