diff --git a/src/modules/notifications/dto/update-preference.dto.ts b/src/modules/notifications/dto/update-preference.dto.ts
index 914ad28..19af347 100644
--- a/src/modules/notifications/dto/update-preference.dto.ts
+++ b/src/modules/notifications/dto/update-preference.dto.ts
@@ -1,14 +1,14 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { NotifChannelEnum } from '../interfaces/notification.interface';
 import { IsArray, IsEnum } from 'class-validator';
+import { NotifChannelEnum } from '../interfaces/notification.interface';
 
 export class UpdatePreferenceDto {
   @ApiProperty({
-    description: 'Notification type (SMS, PUSH, BOTH, or NONE)',
+    description: 'Notification channels (can be empty or contain any enum values)',
     enum: NotifChannelEnum,
-    example: NotifChannelEnum.SMS,
+    isArray: true,
+    example: ['sms', 'push'],
   })
-  @IsEnum(NotifChannelEnum)
   @IsArray()
   @IsEnum(NotifChannelEnum, { each: true })
   channels!: NotifChannelEnum[];