diff --git a/apps/backend/src/app.module.ts b/apps/backend/src/app.module.ts
index 06db044..aca18d8 100644
--- a/apps/backend/src/app.module.ts
+++ b/apps/backend/src/app.module.ts
@@ -1,4 +1,4 @@
-import { Module } from '@nestjs/common';
+import { MiddlewareConsumer, Module, NestModule } from '@nestjs/common';
 import { ConfigModule } from '@nestjs/config';
 import { CacheModule } from './modules/cache/cache.module';
 import { MoexClientModule } from './modules/moex-client/moex-client.module';
@@ -11,6 +11,7 @@ import { PortfolioModule } from './modules/portfolio/portfolio.module';
 import { PrismaModule } from './modules/prisma/prisma.module';
 import { AuthModule } from './modules/auth/auth.module';
 import { TBankModule } from './modules/tbank/tbank.module';
+import { RequestLoggingMiddleware } from './common/middleware/request-logging.middleware';
 import configuration from './config/configuration';
 
 @Module({
@@ -29,4 +30,8 @@ import configuration from './config/configuration';
     TBankModule,
   ],
 })
-export class AppModule {}
+export class AppModule implements NestModule {
+  configure(consumer: MiddlewareConsumer) {
+    consumer.apply(RequestLoggingMiddleware).forRoutes('*');
+  }
+}
diff --git a/apps/backend/src/main.ts b/apps/backend/src/main.ts
index 7b3e8db..022be54 100644
--- a/apps/backend/src/main.ts
+++ b/apps/backend/src/main.ts
@@ -4,7 +4,6 @@ import { AppModule } from './app.module';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 import { HttpExceptionFilter } from './common/filters/http-exception.filter';
 import { TransformInterceptor } from './common/interceptors/transform.interceptor';
-import { RequestLoggingMiddleware } from './common/middleware/request-logging.middleware';
 import { ValidationPipe } from '@nestjs/common';
 import cookieParser from 'cookie-parser';
 
@@ -18,9 +17,6 @@ async function bootstrap() {
   app.useGlobalInterceptors(new TransformInterceptor());
   app.use(cookieParser());
 
-  const reqLogMiddleware = new RequestLoggingMiddleware();
-  app.use(reqLogMiddleware.use.bind(reqLogMiddleware));
-
   app.enableCors({ origin: true, credentials: true });
 
   const config = new DocumentBuilder()
diff --git a/apps/backend/src/modules/health/health.service.spec.ts b/apps/backend/src/modules/health/health.service.spec.ts
index ae53473..3f6d21a 100644
--- a/apps/backend/src/modules/health/health.service.spec.ts
+++ b/apps/backend/src/modules/health/health.service.spec.ts
@@ -6,10 +6,10 @@ import configuration from '../../config/configuration';
 
 describe('HealthService', () => {
   let service: HealthService;
-  let prisma: Pick<PrismaService, '$queryRaw'>;
+  const prisma = { $queryRaw: vi.fn() } as any;
 
   beforeEach(async () => {
-    prisma = { $queryRaw: vi.fn() };
+    vi.clearAllMocks();
 
     const module: TestingModule = await Test.createTestingModule({
       imports: [ConfigModule.forRoot({ load: [configuration], isGlobal: true })],
diff --git a/docs/features/backend-architecture-improvements/tasks.md b/docs/features/backend-architecture-improvements/tasks.md
index ec33282..42a5194 100644
--- a/docs/features/backend-architecture-improvements/tasks.md
+++ b/docs/features/backend-architecture-improvements/tasks.md
@@ -39,10 +39,11 @@
 - [x] 4.6 Тесты: `health.service.spec.ts` (3 теста) + `envelope-contract.spec.ts` проверяет checks
 - [x] Все 120 тестов проходят
 
-## Итерация 5: RequestLoggingMiddleware DI
+## Итерация 5: RequestLoggingMiddleware DI ✅
 
-- [ ] 5.1 Переписать подключение через `configure()` в `AppModule`
-- [ ] 5.2 Убрать `app.use()` из `main.ts`
+- [x] 5.1 `AppModule` implements `NestModule` с `configure()` → `consumer.apply(RequestLoggingMiddleware).forRoutes('*')`
+- [x] 5.2 Убран `new RequestLoggingMiddleware()` и `app.use()` из `main.ts`
+- [x] 120 тестов проходят, build успешен
 
 ## Итерация 6: MoexClientService split (отдельный эпик)