diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index f20727ce41..f0bf27b319 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -126,6 +126,7 @@ type MinimumUser = {
 
 type Option = {
 	createdAt?: Date | null;
+	updatedAt?: Date | null;
 	name?: string | null;
 	text?: string | null;
 	reply?: MiNote | null;
diff --git a/packages/backend/src/core/activitypub/models/ApNoteService.ts b/packages/backend/src/core/activitypub/models/ApNoteService.ts
index 573dff5b91..632ff16142 100644
--- a/packages/backend/src/core/activitypub/models/ApNoteService.ts
+++ b/packages/backend/src/core/activitypub/models/ApNoteService.ts
@@ -274,6 +274,7 @@ export class ApNoteService {
 		try {
 			return await this.noteCreateService.create(actor, {
 				createdAt: note.published ? new Date(note.published) : null,
+				updatedAt: note.updated ? new Date(note.updated) : null,
 				files,
 				reply,
 				renote: quote,