diff --git a/backend/services/identity-service/src/app.module.ts b/backend/services/identity-service/src/app.module.ts
index 29bb385c..597494a4 100644
--- a/backend/services/identity-service/src/app.module.ts
+++ b/backend/services/identity-service/src/app.module.ts
@@ -17,6 +17,7 @@ import { TotpController } from '@/api/controllers/totp.controller';
 // Application Services
 import { UserApplicationService } from '@/application/services/user-application.service';
 import { TokenService } from '@/application/services/token.service';
+import { TotpService } from '@/application/services/totp.service';
 import { BlockchainWalletHandler } from '@/application/event-handlers/blockchain-wallet.handler';
 import { MpcKeygenCompletedHandler } from '@/application/event-handlers/mpc-keygen-completed.handler';
 
@@ -105,11 +106,12 @@ export class DomainModule {}
   providers: [
     UserApplicationService,
     TokenService,
+    TotpService,
     // Event Handlers - 通过注入到 UserApplicationService 来确保它们被初始化
     BlockchainWalletHandler,
     MpcKeygenCompletedHandler,
   ],
-  exports: [UserApplicationService, TokenService],
+  exports: [UserApplicationService, TokenService, TotpService],
 })
 export class ApplicationModule {}