diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a15faf6a7..b60fd7cfa0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@
 -->
 
 ## 12.x.x (unreleased)
+- ActivityPub: deliverキューのメモリ使用量を削減
 
 ### Improvements
 - ActivityPub: リモートユーザーのDeleteアクティビティに対応
diff --git a/src/queue/index.ts b/src/queue/index.ts
index 4ca7998e61..ee34ed47e4 100644
--- a/src/queue/index.ts
+++ b/src/queue/index.ts
@@ -64,7 +64,9 @@ export function deliver(user: ThinUser, content: unknown, to: string | null) {
 	if (to == null) return null;
 
 	const data = {
-		user,
+		user: {
+			id: user.id
+		},
 		content,
 		to
 	};