diff --git a/lib/core/error/rest_service_exception.dart b/lib/core/error/rest_service_exception.dart
index 3f1bd35..4189d4d 100644
--- a/lib/core/error/rest_service_exception.dart
+++ b/lib/core/error/rest_service_exception.dart
@@ -5,8 +5,8 @@ class RestServiceException extends ServiceException {
   final int statusCode;
   final dynamic responseBody;
 
-  RestServiceException(this.statusCode, {this.responseBody, String? message})
-      : super(code: ErrorCode.restError, message: message);
+  RestServiceException(this.statusCode, {this.responseBody, super.message = null})
+      : super(code: ErrorCode.restError);
 
   @override
   String toString() {
diff --git a/lib/core/manager/dialog_manager.dart b/lib/core/manager/dialog_manager.dart
index 5eb75d0..94b9217 100644
--- a/lib/core/manager/dialog_manager.dart
+++ b/lib/core/manager/dialog_manager.dart
@@ -8,7 +8,7 @@ import '../services/dialog_service.dart';
 class DialogManager extends StatefulWidget {
   final Widget? child;
 
-  const DialogManager({Key? key, this.child}) : super(key: key);
+  const DialogManager({super.key, this.child});
 
   @override
   _DialogManagerState createState() => _DialogManagerState();
diff --git a/lib/core/manager/lifecycle_manager.dart b/lib/core/manager/lifecycle_manager.dart
index 09840ed..8113e1a 100644
--- a/lib/core/manager/lifecycle_manager.dart
+++ b/lib/core/manager/lifecycle_manager.dart
@@ -11,7 +11,7 @@ import '../util/logger.dart';
 class LifeCycleManager extends StatefulWidget {
   final Widget? child;
 
-  const LifeCycleManager({Key? key, this.child}) : super(key: key);
+  const LifeCycleManager({super.key, this.child});
 
   @override
   _LifeCycleManagerState createState() => _LifeCycleManagerState();
diff --git a/lib/ui/widgets/my_appbar.dart b/lib/ui/widgets/my_appbar.dart
index 67cd92b..9bda695 100644
--- a/lib/ui/widgets/my_appbar.dart
+++ b/lib/ui/widgets/my_appbar.dart
@@ -7,12 +7,11 @@ class MyAppBar extends AppBar {
   static final List<Widget> aboutDisabledWidgets = [];
 
   MyAppBar(
-      {Key? key,
+      {super.key,
       required Widget title,
       List<Widget>? actionWidgets,
       bool enableAbout = true})
       : super(
-            key: key,
             title: Row(children: <Widget>[title]),
             actions: _renderIconButtons(actionWidgets, enableAbout));