diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index b810ae0b5b..4514f3decd 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -592,6 +592,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 		if (!this.isRenote(note) || this.isQuote(note)) {
 			// Increment notes count (user)
 			this.incNotesCountOfUser(user);
+		} else {
+			this.usersRepository.update({ id: user.id }, { updatedAt: new Date() });
 		}
 
 		this.pushToTl(note, user);
diff --git a/packages/backend/src/core/NoteDeleteService.ts b/packages/backend/src/core/NoteDeleteService.ts
index 1c634602f3..9ce8cb6731 100644
--- a/packages/backend/src/core/NoteDeleteService.ts
+++ b/packages/backend/src/core/NoteDeleteService.ts
@@ -127,6 +127,8 @@ export class NoteDeleteService {
 			if (!isRenote(note) || isQuote(note)) {
 				// Decrement notes count (user)
 				this.decNotesCountOfUser(user);
+			} else {
+				this.usersRepository.update({ id: user.id }, { updatedAt: new Date() });
 			}
 
 			if (this.meta.enableStatsForFederatedInstances) {
diff --git a/packages/backend/src/core/NoteEditService.ts b/packages/backend/src/core/NoteEditService.ts
index e9637c56c7..58233b90ee 100644
--- a/packages/backend/src/core/NoteEditService.ts
+++ b/packages/backend/src/core/NoteEditService.ts
@@ -610,6 +610,8 @@ export class NoteEditService implements OnApplicationShutdown {
 			}
 		}
 
+		this.usersRepository.update({ id: user.id }, { updatedAt: new Date() });
+
 		// ハッシュタグ更新
 		this.pushToTl(note, user);
 
diff --git a/packages/backend/src/core/ReactionService.ts b/packages/backend/src/core/ReactionService.ts
index 6cc4ef4205..373fea8605 100644
--- a/packages/backend/src/core/ReactionService.ts
+++ b/packages/backend/src/core/ReactionService.ts
@@ -212,6 +212,8 @@ export class ReactionService {
 				.execute();
 		}
 
+		this.usersRepository.update({ id: user.id }, { updatedAt: new Date() });
+
 		// 30%の確率、セルフではない、3日以内に投稿されたノートの場合ハイライト用ランキング更新
 		if (
 			Math.random() < 0.3 &&
@@ -330,6 +332,8 @@ export class ReactionService {
 				.execute();
 		}
 
+		this.usersRepository.update({ id: user.id }, { updatedAt: new Date() });
+
 		this.globalEventService.publishNoteStream(note.id, 'unreacted', {
 			reaction: this.decodeReaction(exist.reaction).reaction,
 			userId: user.id,