diff --git a/src/remote/activitypub/kernel/announce/index.ts b/src/remote/activitypub/kernel/announce/index.ts
index dfccde3f9..28ad2fbcc 100644
--- a/src/remote/activitypub/kernel/announce/index.ts
+++ b/src/remote/activitypub/kernel/announce/index.ts
@@ -1,7 +1,7 @@
 import Resolver from '../../resolver';
 import { IRemoteUser } from '../../../../models/entities/user';
 import announceNote from './note';
-import { IAnnounce, validPost, getApId } from '../../type';
+import { IAnnounce, getApId } from '../../type';
 import { apLogger } from '../../logger';
 
 const logger = apLogger;
@@ -13,14 +13,7 @@ export default async (actor: IRemoteUser, activity: IAnnounce): Promise<void> =>
 
 	const resolver = new Resolver();
 
-	const object = await resolver.resolve(activity.object).catch(e => {
-		logger.error(`Resolution failed: ${e}`);
-		throw e;
-	});
+	const targetUri = getApId(activity.object);
 
-	if (validPost.includes(object.type)) {
-		announceNote(resolver, actor, activity, object);
-	} else {
-		logger.warn(`Unknown announce type: ${object.type}`);
-	}
+	announceNote(resolver, actor, activity, targetUri);
 };
diff --git a/src/remote/activitypub/kernel/announce/note.ts b/src/remote/activitypub/kernel/announce/note.ts
index a5db5b8ca..f22ed77d4 100644
--- a/src/remote/activitypub/kernel/announce/note.ts
+++ b/src/remote/activitypub/kernel/announce/note.ts
@@ -1,7 +1,7 @@
 import Resolver from '../../resolver';
 import post from '../../../../services/note/create';
 import { IRemoteUser, User } from '../../../../models/entities/user';
-import { IAnnounce, IObject, getApId, getApIds } from '../../type';
+import { IAnnounce, getApId, getApIds } from '../../type';
 import { fetchNote, resolveNote } from '../../models/note';
 import { resolvePerson } from '../../models/person';
 import { apLogger } from '../../logger';
@@ -14,7 +14,7 @@ const logger = apLogger;
 /**
  * アナウンスアクティビティを捌きます
  */
-export default async function(resolver: Resolver, actor: IRemoteUser, activity: IAnnounce, note: IObject): Promise<void> {
+export default async function(resolver: Resolver, actor: IRemoteUser, activity: IAnnounce, targetUri: string): Promise<void> {
 	const uri = getApId(activity);
 
 	// アナウンサーが凍結されていたらスキップ
@@ -38,14 +38,14 @@ export default async function(resolver: Resolver, actor: IRemoteUser, activity:
 		// Announce対象をresolve
 		let renote;
 		try {
-			renote = await resolveNote(note);
+			renote = await resolveNote(targetUri);
 		} catch (e) {
 			// 対象が4xxならスキップ
 			if (e.statusCode >= 400 && e.statusCode < 500) {
-				logger.warn(`Ignored announce target ${note.inReplyTo} - ${e.statusCode}`);
+				logger.warn(`Ignored announce target ${targetUri} - ${e.statusCode}`);
 				return;
 			}
-			logger.warn(`Error in announce target ${note.inReplyTo} - ${e.statusCode || e}`);
+			logger.warn(`Error in announce target ${targetUri} - ${e.statusCode || e}`);
 			throw e;
 		}