diff --git a/backend/services/leaderboard-service/src/api/dto/leaderboard-config.dto.ts b/backend/services/leaderboard-service/src/api/dto/leaderboard-config.dto.ts
index 096cd0f0..3f43456f 100644
--- a/backend/services/leaderboard-service/src/api/dto/leaderboard-config.dto.ts
+++ b/backend/services/leaderboard-service/src/api/dto/leaderboard-config.dto.ts
@@ -1,5 +1,5 @@
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
-import { IsBoolean, IsInt, IsOptional, Min, Max } from 'class-validator';
+import { IsBoolean, IsInt, IsOptional, IsIn, Min, Max } from 'class-validator';
 import { Type } from 'class-transformer';
 
 /**
@@ -57,6 +57,7 @@ export class UpdateLeaderboardSwitchDto {
     description: '榜单类型',
     example: 'daily',
   })
+  @IsIn(['daily', 'weekly', 'monthly'])
   type: 'daily' | 'weekly' | 'monthly';
 
   @ApiProperty({ description: '是否启用', example: true })