diff --git a/packages/backend/src/server/api/endpoints/notes/versions.ts b/packages/backend/src/server/api/endpoints/notes/versions.ts
index 2b774ae2b0..96715ce6b2 100644
--- a/packages/backend/src/server/api/endpoints/notes/versions.ts
+++ b/packages/backend/src/server/api/endpoints/notes/versions.ts
@@ -27,6 +27,12 @@ export const meta = {
 			code: 'NO_SUCH_NOTE',
 			id: '24fcbfc6-2e37-42b6-8388-c29b3861a08d',
 		},
+
+		signinRequired: {
+			message: 'Signin required.',
+			code: 'SIGNIN_REQUIRED',
+			id: '8e75455b-738c-471d-9f80-62693f33372e',
+		},
 	},
 } as const;
 
@@ -43,23 +49,30 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	constructor(
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
-		
+
 		private getterService: GetterService,
 		private queryService: QueryService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const query = await this.notesRepository.createQueryBuilder('note')
-				.select('note.id')
-				.where('note.id = :noteId', { noteId: ps.noteId });
+				.where('note.id = :noteId', { noteId: ps.noteId })
+				.innerJoinAndSelect('note.user', 'user');
 
 			this.queryService.generateVisibilityQuery(query, me);
-			
+			if (me) {
+				this.queryService.generateBlockedUserQuery(query, me);
+			}
+
 			const note = await query.getOne();
 
 			if (note === null) {
 				throw new ApiError(meta.errors.noSuchNote);
 			}
 
+			if (note.user!.requireSigninToViewContents && me == null) {
+				throw new ApiError(meta.errors.signinRequired);
+			}
+
 			const edits = await this.getterService.getEdits(ps.noteId).catch(err => {
 				if (err.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
 				throw err;