diff --git a/add_to_app/books/flutter_module_books/lib/main.dart b/add_to_app/books/flutter_module_books/lib/main.dart
index edd9ef179..0f9cc3537 100644
--- a/add_to_app/books/flutter_module_books/lib/main.dart
+++ b/add_to_app/books/flutter_module_books/lib/main.dart
@@ -15,6 +15,7 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       theme: ThemeData(
         primaryColor: const Color(0xff6200ee),
+        useMaterial3: true,
       ),
       home: const BookDetail(),
     );