diff --git a/backend/src/album/album.entity.ts b/backend/src/album/album.entity.ts
index 7e52bde..b3b9781 100644
--- a/backend/src/album/album.entity.ts
+++ b/backend/src/album/album.entity.ts
@@ -1,5 +1,5 @@
 import { Entity, Column, OneToMany, PrimaryGeneratedColumn } from 'typeorm';
-import { IsNotEmpty, IsString } from 'class-validator';
+import { IsNotEmpty, IsString, IsOptional } from 'class-validator';
 import { Song } from '../song/song.entity';
 
 @Entity('album')
@@ -22,6 +22,7 @@ export class Album {
   @IsNotEmpty()
   genre: string;
 
+  @IsOptional()
   @OneToMany(() => Song, (song) => song.album, {
     eager: true,
     onDelete: 'CASCADE',