diff --git a/packages/flutter_chat_local/lib/service/local_chat_detail_service.dart b/packages/flutter_chat_local/lib/service/local_chat_detail_service.dart
index 7341235..b0cf5d2 100644
--- a/packages/flutter_chat_local/lib/service/local_chat_detail_service.dart
+++ b/packages/flutter_chat_local/lib/service/local_chat_detail_service.dart
@@ -68,7 +68,7 @@ class LocalChatDetailService with ChangeNotifier implements ChatDetailService {
         .chats
         .firstWhere((element) => element.id == chatId);
     var message = ChatImageMessageModel(
-      sender: ChatUserModel(
+      sender: const ChatUserModel(
         id: '3',
         firstName: 'ico',
         lastName: 'nica',
@@ -101,7 +101,7 @@ class LocalChatDetailService with ChangeNotifier implements ChatDetailService {
         .chats
         .firstWhere((element) => element.id == chatId);
     var message = ChatTextMessageModel(
-      sender: ChatUserModel(
+      sender: const ChatUserModel(
         id: '3',
         firstName: 'ico',
         lastName: 'nica',
diff --git a/packages/flutter_chat_local/lib/service/local_chat_user_service.dart b/packages/flutter_chat_local/lib/service/local_chat_user_service.dart
index 5a0f5a7..5ad90db 100644
--- a/packages/flutter_chat_local/lib/service/local_chat_user_service.dart
+++ b/packages/flutter_chat_local/lib/service/local_chat_user_service.dart
@@ -4,19 +4,19 @@ import 'package:flutter_chat_interface/flutter_chat_interface.dart';
 class LocalChatUserService implements ChatUserService {
   /// List of predefined chat users.
   List<ChatUserModel> users = [
-    ChatUserModel(
+    const ChatUserModel(
       id: '1',
       firstName: 'John',
       lastName: 'Doe',
       imageUrl: 'https://picsum.photos/200/300',
     ),
-    ChatUserModel(
+    const ChatUserModel(
       id: '2',
       firstName: 'Jane',
       lastName: 'Doe',
       imageUrl: 'https://picsum.photos/200/300',
     ),
-    ChatUserModel(
+    const ChatUserModel(
       id: '3',
       firstName: 'ico',
       lastName: 'nica',
@@ -29,7 +29,8 @@ class LocalChatUserService implements ChatUserService {
       Future.value(users.where((element) => element.id != '3').toList());
 
   @override
-  Future<ChatUserModel?> getCurrentUser() => Future.value(ChatUserModel());
+  Future<ChatUserModel?> getCurrentUser() =>
+      Future.value(const ChatUserModel());
 
   @override
   Future<ChatUserModel?> getUser(String id) {