diff --git a/backend/services/auth-service/src/api/controllers/trade-password.controller.ts b/backend/services/auth-service/src/api/controllers/trade-password.controller.ts
index 05c372c2..278ab1f7 100644
--- a/backend/services/auth-service/src/api/controllers/trade-password.controller.ts
+++ b/backend/services/auth-service/src/api/controllers/trade-password.controller.ts
@@ -7,22 +7,35 @@ import {
   HttpStatus,
   UseGuards,
 } from '@nestjs/common';
+import { IsString, IsNotEmpty } from 'class-validator';
 import { ThrottlerGuard } from '@nestjs/throttler';
 import { TradePasswordService } from '@/application/services/trade-password.service';
 import { JwtAuthGuard } from '@/shared/guards/jwt-auth.guard';
 import { CurrentUser } from '@/shared/decorators/current-user.decorator';
 
 class SetTradePasswordDto {
+  @IsString()
+  @IsNotEmpty()
   loginPassword: string;
+
+  @IsString()
+  @IsNotEmpty()
   tradePassword: string;
 }
 
 class ChangeTradePasswordDto {
+  @IsString()
+  @IsNotEmpty()
   oldTradePassword: string;
+
+  @IsString()
+  @IsNotEmpty()
   newTradePassword: string;
 }
 
 class VerifyTradePasswordDto {
+  @IsString()
+  @IsNotEmpty()
   tradePassword: string;
 }