diff --git a/CHANGELOG_CHERRYPICK.md b/CHANGELOG_CHERRYPICK.md
index cacbfb1fdf..7116941c85 100644
--- a/CHANGELOG_CHERRYPICK.md
+++ b/CHANGELOG_CHERRYPICK.md
@@ -39,6 +39,7 @@ Misskey의 전체 변경 사항을 확인하려면, [CHANGELOG.md#2024xx](CHANGE
 ### Server
 - Enhance: 디버깅을 보다 편하게 할 수 있도록 vite 생성 파일의 이름 개선
 - Fix: 엔드포인트 `users/translate` 에러 개선
+- Fix: Mastodon 사용자에게 대화를 보낼 때 [#objectobject] 태그가 추가될 수 있음
 
 ---
 
diff --git a/packages/backend/src/core/MessagingService.ts b/packages/backend/src/core/MessagingService.ts
index 5891f2c8ea..0a05e3acd9 100644
--- a/packages/backend/src/core/MessagingService.ts
+++ b/packages/backend/src/core/MessagingService.ts
@@ -137,7 +137,7 @@ export class MessagingService {
 				userId: message.userId,
 				visibility: 'specified',
 				emojis: [{}],
-				tags: [{}],
+				tags: [],
 				mentions: [recipientUser].map(u => u.id),
 				mentionedRemoteUsers: JSON.stringify([recipientUser].map(u => ({
 					uri: u.uri,
@@ -146,7 +146,7 @@ export class MessagingService {
 					host: u.host,
 				} as IMentionedRemoteUsers[0]
 				))),
-			} as MiNote;
+			} as unknown as MiNote;
 
 			const activity = this.apRendererService.addContext(this.apRendererService.renderCreate(await this.apRendererService.renderNote(note, false, true), note));