diff --git a/backend/services/reward-service/src/application/services/reward-application.service.ts b/backend/services/reward-service/src/application/services/reward-application.service.ts
index b2ee46be..af7bb5b9 100644
--- a/backend/services/reward-service/src/application/services/reward-application.service.ts
+++ b/backend/services/reward-service/src/application/services/reward-application.service.ts
@@ -1530,7 +1530,7 @@ export class RewardApplicationService {
       entries: entries.map(entry => ({
         id: entry.id.toString(),
         accountSequence: entry.accountSequence,
-        userId: entry.userId,
+        userId: Number(entry.userId),
         sourceOrderId: entry.sourceOrderNo,
         rightType: entry.rightType,
         usdtAmount: Number(entry.usdtAmount),