diff --git a/packages/flutter_adaptive_scaffold/CHANGELOG.md b/packages/flutter_adaptive_scaffold/CHANGELOG.md
index 70e4f65..20bb4c8 100644
--- a/packages/flutter_adaptive_scaffold/CHANGELOG.md
+++ b/packages/flutter_adaptive_scaffold/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.0.6
+
+* Change type of `appBar` parameter from `AppBar?` to `PreferredSizeWidget?`
+
 ## 0.0.5
 
 * Calls onDestinationChanged callback in bottom nav bar.
diff --git a/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart b/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
index 0521634..58509ff 100644
--- a/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
+++ b/packages/flutter_adaptive_scaffold/lib/src/adaptive_scaffold.dart
@@ -217,7 +217,7 @@
 
   /// Option to override the default [AppBar] when using drawer in desktop
   /// small.
-  final AppBar? appBar;
+  final PreferredSizeWidget? appBar;
 
   /// Callback function for when the index of a [NavigationRail] changes.
   final Function(int)? onSelectedIndexChange;
diff --git a/packages/flutter_adaptive_scaffold/pubspec.yaml b/packages/flutter_adaptive_scaffold/pubspec.yaml
index 46ab151..59f6f67 100644
--- a/packages/flutter_adaptive_scaffold/pubspec.yaml
+++ b/packages/flutter_adaptive_scaffold/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_adaptive_scaffold
 description: Widgets to easily build adaptive layouts, including navigation elements.
-version: 0.0.5
+version: 0.0.6
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+flutter_adaptive_scaffold%22
 repository: https://github.com/flutter/packages/tree/main/packages/flutter_adaptive_scaffold
 
diff --git a/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart b/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
index 1b24b6b..4b8b632 100644
--- a/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
+++ b/packages/flutter_adaptive_scaffold/test/adaptive_scaffold_test.dart
@@ -168,6 +168,46 @@
       expect(selectedIndex, state.index);
     });
   });
+
+  // Regression test for https://github.com/flutter/flutter/issues/111008
+  testWidgets(
+    'appBar parameter should have the type PreferredSizeWidget',
+    (WidgetTester tester) async {
+      await tester.pumpWidget(MaterialApp(
+        home: MediaQuery(
+          data: const MediaQueryData(size: Size(500, 800)),
+          child: AdaptiveScaffold(
+            drawerBreakpoint: TestBreakpoint0(),
+            internalAnimations: false,
+            destinations: const <NavigationDestination>[
+              NavigationDestination(icon: Icon(Icons.inbox), label: 'Inbox'),
+              NavigationDestination(
+                  icon: Icon(Icons.video_call), label: 'Video'),
+            ],
+            appBar: const PreferredSizeWidgetImpl(),
+          ),
+        ),
+      ));
+
+      expect(find.byType(PreferredSizeWidgetImpl), findsOneWidget);
+    },
+  );
+}
+
+/// An empty widget that implements [PreferredSizeWidget] to ensure that
+/// [PreferredSizeWidget] is used as [AdaptiveScaffold.appBar] parameter instead
+/// of [AppBar].
+class PreferredSizeWidgetImpl extends StatelessWidget
+    implements PreferredSizeWidget {
+  const PreferredSizeWidgetImpl({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container();
+  }
+
+  @override
+  Size get preferredSize => const Size(200, 200);
 }
 
 class TestBreakpoint0 extends Breakpoint {