diff --git a/BE/src/post/post.controller.ts b/BE/src/post/post.controller.ts
index c4d2753..635911f 100644
--- a/BE/src/post/post.controller.ts
+++ b/BE/src/post/post.controller.ts
@@ -68,11 +68,7 @@ export class PostController {
   @UseInterceptors(FilesInterceptor('image', 12))
   async postModify(
     @Param('id') id: number,
-    @UploadedFiles(
-      new ParseFilePipe({
-        validators: [new MaxFileSizeValidator({ maxSize: 1024 * 1024 * 20 })],
-      }),
-    )
+    @UploadedFiles(new FileSizeValidator())
     files: Array<Express.Multer.File>,
     @MultiPartBody(
       'post_info',
diff --git a/BE/src/users/users.controller.ts b/BE/src/users/users.controller.ts
index 179cd25..627df61 100644
--- a/BE/src/users/users.controller.ts
+++ b/BE/src/users/users.controller.ts
@@ -21,6 +21,7 @@ import { MultiPartBody } from 'src/utils/multiPartBody.decorator';
 import { UpdateUsersDto } from './usersUpdate.dto';
 import { AuthGuard } from 'src/utils/auth.guard';
 import { UserHash } from '../utils/auth.decorator';
+import { FileSizeValidator } from '../utils/files.validator';
 
 @Controller('users')
 @UseGuards(AuthGuard)
@@ -70,7 +71,7 @@ export class UsersController {
   async usersModify(
     @Param('id') id: string,
     @MultiPartBody('profile') body: UpdateUsersDto,
-    @UploadedFile() file: Express.Multer.File,
+    @UploadedFile(new FileSizeValidator()) file: Express.Multer.File,
     @UserHash() userId,
   ) {
     await this.usersService.updateUserById(id, body, file, userId);
diff --git a/BE/src/utils/files.validator.ts b/BE/src/utils/files.validator.ts
index e920740..a2b2332 100644
--- a/BE/src/utils/files.validator.ts
+++ b/BE/src/utils/files.validator.ts
@@ -8,7 +8,7 @@ import {
 @Injectable()
 export class FileSizeValidator implements PipeTransform {
   transform(value: any, metadata: ArgumentMetadata): any {
-    if (value.length === 0) {
+    if (value === undefined || value.length === 0) {
       return value;
     }
     const maxSize = 1024 * 1024 * 20;