diff --git a/mnemo_cards_backend/Dockerfile b/mnemo_cards_backend/Dockerfile
index 59d33b7..5d1a72e 100644
--- a/mnemo_cards_backend/Dockerfile
+++ b/mnemo_cards_backend/Dockerfile
@@ -57,8 +57,9 @@ ENV PORT=3000 \
 EXPOSE 3000
 
 # Healthcheck - проверка доступности сервера
-HEALTHCHECK --interval=15s --timeout=5s --start-period=10s --retries=5 \
-  CMD sh -c 'curl -sf http://127.0.0.1:${PORT:-3000}/health || exit 1'
+# Increased start-period to 30s to allow server initialization (Isar, cron jobs, etc.)
+HEALTHCHECK --interval=10s --timeout=5s --start-period=20s --retries=3 \
+  CMD curl -f http://127.0.0.1:${PORT:-3000}/health || exit 1
 
 # Start server - все настройки читаются из environment variables
 CMD ["/app/server"]
diff --git a/mnemo_cards_backend/lib/api/mnemo_shelf.dart b/mnemo_cards_backend/lib/api/mnemo_shelf.dart
index 09dcc9d..1224aa4 100644
--- a/mnemo_cards_backend/lib/api/mnemo_shelf.dart
+++ b/mnemo_cards_backend/lib/api/mnemo_shelf.dart
@@ -45,7 +45,8 @@ class MnemoShelf {
     final port = int.tryParse(portArg ?? '') ?? 3000;
     final certs = Platform.environment['CERTS_PATH']; // null = HTTP without SSL
     final dualMode = Platform.environment['DUAL_MODE'] == 'true' ||
-        Platform.environment['DUAL_MODE'] == '1'; // Запуск HTTP и HTTPS одновременно
+        Platform.environment['DUAL_MODE'] ==
+            '1'; // Запуск HTTP и HTTPS одновременно
 
     // V2 APIs (new RESTful API with OAuth2/JWT)
     final v2Routers = [
@@ -250,8 +251,8 @@ class MnemoShelf {
     // }
 
     return SecurityContext(withTrustedRoots: false);
-      // ..useCertificateChain(serverCert)
-      // ..usePrivateKey(key);
+    // ..useCertificateChain(serverCert)
+    // ..usePrivateKey(key);
   }
 
   logger(String tag) => (String msg, bool isError) {
diff --git a/mnemo_cards_backend/lib/api/v2/admin_analytics_api_v2.dart b/mnemo_cards_backend/lib/api/v2/admin_analytics_api_v2.dart
index a05163b..77b7f65 100644
--- a/mnemo_cards_backend/lib/api/v2/admin_analytics_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/admin_analytics_api_v2.dart
@@ -67,24 +67,32 @@ class AdminAnalyticsApiV2 {
       final paymentCount = await backend_main.isar.paymentModels.count();
 
       // Get recent users (last 10)
-      final allUsers = await backend_main.isar.txn(() async => backend_main.isar.userModels.where().findAll());
+      final allUsers = await backend_main.isar
+          .txn(() async => backend_main.isar.userModels.where().findAll());
       final sortedUsers = allUsers
         ..sort((a, b) => (b.id ?? 0).compareTo(a.id ?? 0));
-      final recentUsers = sortedUsers.take(10).map((u) => {
-        'id': u.id,
-        'name': u.name,
-        'email': u.email,
-        'createdAt': DateTime(1999).toIso8601String(),
-      }).toList();
+      final recentUsers = sortedUsers
+          .take(10)
+          .map((u) => {
+                'id': u.id,
+                'name': u.name,
+                'email': u.email,
+                'createdAt': DateTime(1999).toIso8601String(),
+              })
+          .toList();
 
       // Get top packs by user count (mock data for now)
-      final allPacks = await backend_main.isar.txn(() async => backend_main.isar.cardPackModels.where().findAll());
-      final topPacks = allPacks.take(5).map((p) => {
-        'id': p.id,
-        'title': p.title,
-        'cards': p.cards.length,
-        'enabled': p.enabled,
-      }).toList();
+      final allPacks = await backend_main.isar
+          .txn(() async => backend_main.isar.cardPackModels.where().findAll());
+      final topPacks = allPacks
+          .take(5)
+          .map((p) => {
+                'id': p.id,
+                'title': p.title,
+                'cards': p.cards.length,
+                'enabled': p.enabled,
+              })
+          .toList();
 
       return _json({
         'stats': {
@@ -126,7 +134,8 @@ class AdminAnalyticsApiV2 {
 
       for (int i = 29; i >= 0; i--) {
         final date = now.subtract(Duration(days: i));
-        final registrations = (i % 7) + 1; // Mock data: 1-7 registrations per day
+        final registrations =
+            (i % 7) + 1; // Mock data: 1-7 registrations per day
 
         chartData.add({
           'date': date.toIso8601String().split('T')[0],
diff --git a/mnemo_cards_backend/lib/api/v2/admin_auth_api_v2.dart b/mnemo_cards_backend/lib/api/v2/admin_auth_api_v2.dart
index c56f772..8915107 100644
--- a/mnemo_cards_backend/lib/api/v2/admin_auth_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/admin_auth_api_v2.dart
@@ -146,7 +146,8 @@ Use this code to access the admin panel at admin.mnemo-cards.online
       // Get user from database
       // Note: UserModel doesn't have telegramUserId field, so we need to find user differently
       // For now, we'll look for admin users (assuming admin field exists)
-      final allUsers = await backend_main.isar.txn(() async => backend_main.isar.userModels.where().findAll());
+      final allUsers = await backend_main.isar
+          .txn(() async => backend_main.isar.userModels.where().findAll());
       final user = allUsers.where((u) => u.admin).firstOrNull;
 
       if (user == null) {
diff --git a/mnemo_cards_backend/lib/api/v2/admin_cards_api_v2.dart b/mnemo_cards_backend/lib/api/v2/admin_cards_api_v2.dart
index ee99b68..b35009c 100644
--- a/mnemo_cards_backend/lib/api/v2/admin_cards_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/admin_cards_api_v2.dart
@@ -94,7 +94,8 @@ class AdminCardsApiV2 {
       }
 
       // Get all cards from database
-      final allCards = await backend_main.isar.txn(() async => backend_main.isar.gameCardModels.where().findAll());
+      final allCards = await backend_main.isar
+          .txn(() async => backend_main.isar.gameCardModels.where().findAll());
 
       // Apply search filter if provided
       List<GameCardModel> filteredCards = allCards;
@@ -102,10 +103,12 @@ class AdminCardsApiV2 {
         final searchLower = search.toLowerCase();
         filteredCards = allCards.where((card) {
           return card.original.toLowerCase().contains(searchLower) ||
-                 card.translation.toLowerCase().contains(searchLower) ||
-                 card.mnemo.toLowerCase().contains(searchLower) ||
-                 (card.transcription?.toLowerCase().contains(searchLower) ?? false) ||
-                 (card.transcriptionMnemo?.toLowerCase().contains(searchLower) ?? false);
+              card.translation.toLowerCase().contains(searchLower) ||
+              card.mnemo.toLowerCase().contains(searchLower) ||
+              (card.transcription?.toLowerCase().contains(searchLower) ??
+                  false) ||
+              (card.transcriptionMnemo?.toLowerCase().contains(searchLower) ??
+                  false);
         }).toList();
       }
 
@@ -184,7 +187,8 @@ class AdminCardsApiV2 {
 
       late final GameCardDto cardDto;
       try {
-        cardDto = GameCardDto.fromJson(jsonDecode(body) as Map<String, dynamic>);
+        cardDto =
+            GameCardDto.fromJson(jsonDecode(body) as Map<String, dynamic>);
       } catch (_) {
         return _json(
           {
diff --git a/mnemo_cards_backend/lib/api/v2/admin_packs_api_v2.dart b/mnemo_cards_backend/lib/api/v2/admin_packs_api_v2.dart
index 17bc5f8..3483f48 100644
--- a/mnemo_cards_backend/lib/api/v2/admin_packs_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/admin_packs_api_v2.dart
@@ -98,14 +98,16 @@ class AdminPacksApiV2 {
       }
 
       // Get all packs (admin can see disabled packs)
-      final allPacks = await backend_main.isar.txn(() async => backend_main.isar.cardPackModels.where().findAll());
-      List<CardPackModel> filteredPacks = showDisabled ? allPacks : allPacks.where((p) => p.enabled).toList();
+      final allPacks = await backend_main.isar
+          .txn(() async => backend_main.isar.cardPackModels.where().findAll());
+      List<CardPackModel> filteredPacks =
+          showDisabled ? allPacks : allPacks.where((p) => p.enabled).toList();
       if (search != null && search.isNotEmpty) {
         final searchLower = search.toLowerCase();
         filteredPacks = allPacks.where((pack) {
           return pack.title.toLowerCase().contains(searchLower) ||
-                 (pack.subtitle?.toLowerCase().contains(searchLower) ?? false) ||
-                 pack.id.toString().contains(searchLower);
+              (pack.subtitle?.toLowerCase().contains(searchLower) ?? false) ||
+              pack.id.toString().contains(searchLower);
         }).toList();
       }
 
@@ -119,11 +121,8 @@ class AdminPacksApiV2 {
       final paginatedPacks = filteredPacks.skip(offset).take(limit).toList();
 
       // Convert to preview DTOs
-      final packDtos = await Future.wait(
-        paginatedPacks.map((pack) async =>
-          await _packDtoConverter.toCardPackPreviewDto(pack, null)
-        )
-      );
+      final packDtos = await Future.wait(paginatedPacks.map((pack) async =>
+          await _packDtoConverter.toCardPackPreviewDto(pack, null)));
 
       return _json({
         'items': packDtos.map((p) => p.toJson()).toList(),
@@ -194,7 +193,8 @@ class AdminPacksApiV2 {
 
       late final EditCardPackDto packDto;
       try {
-        packDto = EditCardPackDto.fromJson(jsonDecode(body) as Map<String, dynamic>);
+        packDto =
+            EditCardPackDto.fromJson(jsonDecode(body) as Map<String, dynamic>);
       } catch (_) {
         return _json(
           {
diff --git a/mnemo_cards_backend/lib/api/v2/authorize_v2.dart b/mnemo_cards_backend/lib/api/v2/authorize_v2.dart
index ae11764..b596a87 100644
--- a/mnemo_cards_backend/lib/api/v2/authorize_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/authorize_v2.dart
@@ -53,15 +53,16 @@ Middleware authorizeV2(UserManager userManager, JwtService jwtService) {
       }
 
       // Check if this is a public auth endpoint - always allow for all HTTP methods
-      if (normalizedPath.startsWith('/auth/') || normalizedPath.startsWith('/admin/auth/')) {
+      if (normalizedPath.startsWith('/auth/') ||
+          normalizedPath.startsWith('/admin/auth/')) {
         if (_publicAuthPaths.contains(normalizedPath)) {
           // Auth endpoints in public list are accessible without token
           return await innerHandler(request);
         }
         // Check for dynamic auth paths (e.g., /auth/telegram/code-status/<code>)
-        if (normalizedPath.startsWith('/auth/telegram/code-status') 
-        || normalizedPath.startsWith('/admin/auth/request-code') 
-        || normalizedPath.startsWith('/admin/auth/verify-code')) {
+        if (normalizedPath.startsWith('/auth/telegram/code-status') ||
+            normalizedPath.startsWith('/admin/auth/request-code') ||
+            normalizedPath.startsWith('/admin/auth/verify-code')) {
           // Code status endpoint is public (used before authentication)
           return await innerHandler(request);
         }
diff --git a/mnemo_cards_backend/lib/api/v2/packs_api_v2.dart b/mnemo_cards_backend/lib/api/v2/packs_api_v2.dart
index c9c58cc..e0e5efc 100644
--- a/mnemo_cards_backend/lib/api/v2/packs_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/packs_api_v2.dart
@@ -287,7 +287,7 @@ class PacksApiV2 {
         // getBuyPage may throw if pack doesn't exist (via _fetchPackModel)
         // _fetchPackModel uses ! operator which throws on null
         final errorString = e.toString();
-        if (errorString.contains('Null check') || 
+        if (errorString.contains('Null check') ||
             errorString.contains('null') ||
             e is StateError) {
           return _notFound('Pack not found');
@@ -491,9 +491,7 @@ class PacksApiV2 {
       final items = voices
           .where((voice) => voice.id != null)
           .map(
-            (voice) => voice
-                .toDto(url: '/api/v2/voice/${voice.id}')
-                .toJson(),
+            (voice) => voice.toDto(url: '/api/v2/voice/${voice.id}').toJson(),
           )
           .toList();
 
@@ -563,7 +561,8 @@ class PacksApiV2 {
   }
 
   String? _sanitizeVoicePath(String path) {
-    final normalized = path.replaceAll('\\', '/').replaceFirst(RegExp('^/'), '');
+    final normalized =
+        path.replaceAll('\\', '/').replaceFirst(RegExp('^/'), '');
     if (normalized.contains('..')) {
       return null;
     }
diff --git a/mnemo_cards_backend/lib/api/v2/promocodes_api_v2.dart b/mnemo_cards_backend/lib/api/v2/promocodes_api_v2.dart
index 1b319ec..ec7bc9f 100644
--- a/mnemo_cards_backend/lib/api/v2/promocodes_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/promocodes_api_v2.dart
@@ -61,8 +61,7 @@ class PromocodesApiV2 {
       return _unauthorized();
     }
 
-    final campaigns =
-        await _promoCodesManager.listAvailablePromocodes(user);
+    final campaigns = await _promoCodesManager.listAvailablePromocodes(user);
     return _json({
       'campaigns': campaigns.map((c) => c.toJson()).toList(),
     });
@@ -92,7 +91,7 @@ class PromocodesApiV2 {
     }
 
     final result = await _promoCodesManager.validatePromocode(code, user);
-    
+
     // Return 404 if code not found
     if (!result['valid'] && result['message'] == 'Промокод не найден') {
       return _json(
diff --git a/mnemo_cards_backend/lib/api/v2/subscriptions_api_v2.dart b/mnemo_cards_backend/lib/api/v2/subscriptions_api_v2.dart
index c7db86e..f748068 100644
--- a/mnemo_cards_backend/lib/api/v2/subscriptions_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/subscriptions_api_v2.dart
@@ -91,12 +91,15 @@ class SubscriptionsApiV2 {
         return _unauthorized();
       }
 
-      final subscriptionDto = await _subscriptionManager.getSubscriptionDto(user);
-      
+      final subscriptionDto =
+          await _subscriptionManager.getSubscriptionDto(user);
+
       return _ok({
         'active': subscriptionDto.isActive,
-        if (subscriptionDto.start != null) 'start': subscriptionDto.start!.toIso8601String(),
-        if (subscriptionDto.finish != null) 'finish': subscriptionDto.finish!.toIso8601String(),
+        if (subscriptionDto.start != null)
+          'start': subscriptionDto.start!.toIso8601String(),
+        if (subscriptionDto.finish != null)
+          'finish': subscriptionDto.finish!.toIso8601String(),
       });
     } catch (e, s) {
       developer.log(
diff --git a/mnemo_cards_backend/lib/api/v2/telegram_bot_api_v2.dart b/mnemo_cards_backend/lib/api/v2/telegram_bot_api_v2.dart
index ddae8c7..e1ad551 100644
--- a/mnemo_cards_backend/lib/api/v2/telegram_bot_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/telegram_bot_api_v2.dart
@@ -216,11 +216,13 @@ class TelegramBotApiV2 {
         if (users.length > 1) {
           return _ok({
             'multiple': true,
-            'users': users.map((u) => {
-                  'id': u.id,
-                  'email': u.email,
-                  'name': u.name,
-                }).toList(),
+            'users': users
+                .map((u) => {
+                      'id': u.id,
+                      'email': u.email,
+                      'name': u.name,
+                    })
+                .toList(),
           });
         }
 
@@ -235,10 +237,12 @@ class TelegramBotApiV2 {
           'email': user.email,
           'name': user.name,
           'tags': user.userData.value?.tags.join(',') ?? '',
-          'packs': user.packs.map((p) => {
-                'id': p.id,
-                'title': p.title,
-              }).toList(),
+          'packs': user.packs
+              .map((p) => {
+                    'id': p.id,
+                    'title': p.title,
+                  })
+              .toList(),
           'purchases': user.purchases.length,
           'subscription': sub == null
               ? null
@@ -260,12 +264,14 @@ class TelegramBotApiV2 {
 
         return _ok({
           'total': users.length,
-          'users': users.map((user) => {
-                'id': user.id,
-                'email': user.email ?? '${user.id} ${user.name}',
-                'lastTimeOnline': user.userData.value?.lastTimeOnline
-                    ?.toIso8601String(),
-              }).toList(),
+          'users': users
+              .map((user) => {
+                    'id': user.id,
+                    'email': user.email ?? '${user.id} ${user.name}',
+                    'lastTimeOnline':
+                        user.userData.value?.lastTimeOnline?.toIso8601String(),
+                  })
+              .toList(),
         });
       }
     } catch (e, s) {
diff --git a/mnemo_cards_backend/lib/api/v2/telegram_bot_auth_middleware.dart b/mnemo_cards_backend/lib/api/v2/telegram_bot_auth_middleware.dart
index 9002bea..eb17395 100644
--- a/mnemo_cards_backend/lib/api/v2/telegram_bot_auth_middleware.dart
+++ b/mnemo_cards_backend/lib/api/v2/telegram_bot_auth_middleware.dart
@@ -29,7 +29,8 @@ Middleware telegramBotAuthMiddleware() {
         return Response(
           500,
           headers: {'Content-Type': 'application/json'},
-          body: '{"error":"Internal Server Error","message":"API key not configured"}',
+          body:
+              '{"error":"Internal Server Error","message":"API key not configured"}',
         );
       }
 
diff --git a/mnemo_cards_backend/lib/api/v2/users_api_v2.dart b/mnemo_cards_backend/lib/api/v2/users_api_v2.dart
index 8116098..2503b93 100644
--- a/mnemo_cards_backend/lib/api/v2/users_api_v2.dart
+++ b/mnemo_cards_backend/lib/api/v2/users_api_v2.dart
@@ -475,7 +475,8 @@ class UsersApiV2 {
         studyDates.add(now);
 
         // Update total study time
-        final totalStudyTime = userData.totalStudyTimeMinutes + sessionDto.duration.inMinutes;
+        final totalStudyTime =
+            userData.totalStudyTimeMinutes + sessionDto.duration.inMinutes;
 
         // Recalculate streak
         final currentStreak = _statisticsCalculator.calculateStreak(studyDates);
diff --git a/mnemo_cards_backend/lib/packs/pack_dto_converter.dart b/mnemo_cards_backend/lib/packs/pack_dto_converter.dart
index 91b0217..f86bdcf 100644
--- a/mnemo_cards_backend/lib/packs/pack_dto_converter.dart
+++ b/mnemo_cards_backend/lib/packs/pack_dto_converter.dart
@@ -58,8 +58,10 @@ class PackDtoConverter {
                   'icons/ad.webp',
                   position: PackTipPosition.bottomRight,
                 )
-              : AssetPackTip('icons/lock.webp',
-                  position: PackTipPosition.bottomRight,),
+              : AssetPackTip(
+                  'icons/lock.webp',
+                  position: PackTipPosition.bottomRight,
+                ),
       version: model.version,
     );
   }
diff --git a/mnemo_cards_backend/lib/packs/pack_manager.dart b/mnemo_cards_backend/lib/packs/pack_manager.dart
index 48ec72d..f8eb850 100644
--- a/mnemo_cards_backend/lib/packs/pack_manager.dart
+++ b/mnemo_cards_backend/lib/packs/pack_manager.dart
@@ -384,11 +384,16 @@ class PackManager {
     String appVersion,
   ) async {
     final pack = await _fetchPackModel(packId);
-    final archiveFile = File(
-      '${assetsDirectory.path}/pack_archives/${appVersion}/${packId}_${pack.version}.zip',
-    );
-    if (await archiveFile.exists()) {
-      return archiveFile.readAsBytes();
+    try {
+      final archiveFile = File(
+        '${assetsDirectory.path}/pack_archives/${appVersion}/${packId}_${pack.version}.zip',
+      );
+      if (await archiveFile.exists()) {
+        return await archiveFile.readAsBytes();
+      }
+    } catch (e, s) {
+      log('Error when fetching pack images archive', error: e, stackTrace: s);
+      return [];
     }
     final cards = pack.cards;
     final rawData = _fetchPackImages(cards.toList());
diff --git a/mnemo_cards_backend/lib/promo_codes/promo_codes_manager.dart b/mnemo_cards_backend/lib/promo_codes/promo_codes_manager.dart
index 3437e10..a7a31f9 100644
--- a/mnemo_cards_backend/lib/promo_codes/promo_codes_manager.dart
+++ b/mnemo_cards_backend/lib/promo_codes/promo_codes_manager.dart
@@ -226,8 +226,10 @@ class PromoCodesManager {
         final upperCode = code.toUpperCase();
 
         // Check if code exists
-        final codeModel =
-            await isar.promoCodeModels.filter().codeEqualTo(upperCode).findFirst();
+        final codeModel = await isar.promoCodeModels
+            .filter()
+            .codeEqualTo(upperCode)
+            .findFirst();
         await codeModel?.campaign.load();
         final campaign = codeModel?.campaign.value;
         if (codeModel == null || campaign == null) {
diff --git a/mnemo_cards_backend/lib/tests/generators/question_generators/input_buttons_question_generator.dart b/mnemo_cards_backend/lib/tests/generators/question_generators/input_buttons_question_generator.dart
index be6da48..b9da03b 100644
--- a/mnemo_cards_backend/lib/tests/generators/question_generators/input_buttons_question_generator.dart
+++ b/mnemo_cards_backend/lib/tests/generators/question_generators/input_buttons_question_generator.dart
@@ -53,9 +53,8 @@ class InputButtonsQuestionGenerator implements QuestionGenerator {
     final questionType = type ?? _getRandomQuestionType();
     final questionText =
         questionType.translationQuestion ? answerItem.translation : null;
-    final questionImage = questionType.imageQuestion 
-        ? _imageIdToUrl(answerItem.image) 
-        : null;
+    final questionImage =
+        questionType.imageQuestion ? _imageIdToUrl(answerItem.image) : null;
 
     String? questionAudio = null;
     if (questionType.audioQuestion) {
@@ -116,7 +115,6 @@ class InputButtonsQuestionGenerator implements QuestionGenerator {
     );
   }
 
-
   Future<InputButtonsTestQuestionBody> verbTestQuestion(
       TestDataItem answerCard) async {
     final ends = ['o', 'as', 'a', 'a', 'a', 'amos', 'ais', 'an', 'an', 'an'];
diff --git a/mnemo_cards_backend/lib/tests/generators/question_generators/simple_question_generator.dart b/mnemo_cards_backend/lib/tests/generators/question_generators/simple_question_generator.dart
index 91fbf31..aeae051 100644
--- a/mnemo_cards_backend/lib/tests/generators/question_generators/simple_question_generator.dart
+++ b/mnemo_cards_backend/lib/tests/generators/question_generators/simple_question_generator.dart
@@ -52,9 +52,8 @@ class SimpleQuestionGenerator implements QuestionGenerator {
         : questionType.translationQuestion
             ? answerCard.translation
             : null;
-    final questionImage = questionType.imageQuestion 
-        ? _imageIdToUrl(answerCard.image) 
-        : null;
+    final questionImage =
+        questionType.imageQuestion ? _imageIdToUrl(answerCard.image) : null;
     String? questionAudio = null;
     if (questionType.audioQuestion) {
       if (questionType.translationAnswers || questionType.imagesAnswers) {
@@ -93,7 +92,6 @@ class SimpleQuestionGenerator implements QuestionGenerator {
     );
   }
 
-
   Future<SimpleTestQuestionBody> verbTestQuestion(
     TestDataItem answerCard, {
     bool withAudio = true,
diff --git a/mnemo_cards_backend/lib/user/admin_ids_service.dart b/mnemo_cards_backend/lib/user/admin_ids_service.dart
index 12748f4..cf9e6bf 100644
--- a/mnemo_cards_backend/lib/user/admin_ids_service.dart
+++ b/mnemo_cards_backend/lib/user/admin_ids_service.dart
@@ -18,4 +18,4 @@ class AdminIdsService {
     }
     return [];
   }
-}
\ No newline at end of file
+}
diff --git a/mnemo_cards_backend/lib/user/telegram.dart b/mnemo_cards_backend/lib/user/telegram.dart
index d508fb1..1bdbc8a 100644
--- a/mnemo_cards_backend/lib/user/telegram.dart
+++ b/mnemo_cards_backend/lib/user/telegram.dart
@@ -76,9 +76,11 @@ class TelegramUtils {
   }
 
   /// Send message to admin via Telegram Bot API
-  static Future<bool> sendMessageToAdmin(String telegramUserId, String message) async {
+  static Future<bool> sendMessageToAdmin(
+      String telegramUserId, String message) async {
     try {
-      final url = Uri.parse('https://api.telegram.org/bot$_botToken/sendMessage');
+      final url =
+          Uri.parse('https://api.telegram.org/bot$_botToken/sendMessage');
 
       final response = await http.post(
         url,