diff --git a/src/media/media-upload.dto.ts b/src/media/media-upload.dto.ts
index da82d9096..8bf462371 100644
--- a/src/media/media-upload.dto.ts
+++ b/src/media/media-upload.dto.ts
@@ -23,7 +23,7 @@ export class MediaUploadDto {
   @IsString()
   @IsOptional()
   @ApiProperty()
-  noteId?: string;
+  noteId: string | null;
 
   /**
    * The date when the upload objects was created.
diff --git a/src/media/media.service.ts b/src/media/media.service.ts
index 4054c5f0f..2e68c4642 100644
--- a/src/media/media.service.ts
+++ b/src/media/media.service.ts
@@ -227,7 +227,7 @@ export class MediaService {
   toMediaUploadDto(mediaUpload: MediaUpload): MediaUploadDto {
     return {
       url: mediaUpload.fileUrl,
-      noteId: mediaUpload.note?.id,
+      noteId: mediaUpload.note?.id ?? null,
       createdAt: mediaUpload.createdAt,
       userName: mediaUpload.user.userName,
     };