diff --git a/lib/scaffolds/long_list.dart b/lib/scaffolds/long_list.dart
index 7ee97c5..0f70c3e 100644
--- a/lib/scaffolds/long_list.dart
+++ b/lib/scaffolds/long_list.dart
@@ -46,7 +46,7 @@ class LongListStatefulScaffold<T, K> extends StatefulWidget {
   });
 
   @override
-  _LongListStatefulScaffoldState createState() =>
+  _LongListStatefulScaffoldState<T, K> createState() =>
       _LongListStatefulScaffoldState();
 }
 
diff --git a/lib/scaffolds/refresh_stateful.dart b/lib/scaffolds/refresh_stateful.dart
index 29b8c93..5cb5d5e 100644
--- a/lib/scaffolds/refresh_stateful.dart
+++ b/lib/scaffolds/refresh_stateful.dart
@@ -19,7 +19,7 @@ class RefreshStatefulScaffold<T> extends StatefulWidget {
   });
 
   @override
-  _RefreshStatefulScaffoldState createState() =>
+  _RefreshStatefulScaffoldState<T> createState() =>
       _RefreshStatefulScaffoldState();
 }
 
diff --git a/lib/scaffolds/tab_stateful.dart b/lib/scaffolds/tab_stateful.dart
index 6a6b82b..6c3b3ce 100644
--- a/lib/scaffolds/tab_stateful.dart
+++ b/lib/scaffolds/tab_stateful.dart
@@ -19,7 +19,7 @@ class TabStatefulScaffold<T> extends StatefulWidget {
   });
 
   @override
-  _TabStatefulScaffoldState createState() => _TabStatefulScaffoldState();
+  _TabStatefulScaffoldState<T> createState() => _TabStatefulScaffoldState();
 }
 
 class _TabStatefulScaffoldState<T> extends State<TabStatefulScaffold<T>> {