diff --git a/project/backend/src/channel/dto/message-pagination.dto.ts b/project/backend/src/channel/dto/message-pagination.dto.ts
index c83976a0..9c2b9372 100644
--- a/project/backend/src/channel/dto/message-pagination.dto.ts
+++ b/project/backend/src/channel/dto/message-pagination.dto.ts
@@ -16,11 +16,11 @@ export class MessagePaginationDto {
   @ApiProperty({
     description: '페이지당 메시지 수',
     required: false,
-    default: 10,
     example: 10,
   })
   @Type(() => Number)
+  @IsOptional()
   @IsInt()
   @Min(1)
-  pageSize: number = 10;
+  pageSize?: number;
 }