diff --git a/packages/backend/src/remote/activitypub/models/note.ts b/packages/backend/src/remote/activitypub/models/note.ts
index 20db3c8df..f5426da3c 100644
--- a/packages/backend/src/remote/activitypub/models/note.ts
+++ b/packages/backend/src/remote/activitypub/models/note.ts
@@ -157,7 +157,7 @@ export async function createNote(value: string | IObject, resolver: Resolver, si
 	// 引用
 	let quote: Note | undefined | null;
 
-	if (note._misskey_quote || note.quoteUrl) {
+	if (note._misskey_quote || note.quoteUri) {
 		const tryResolveNote = async (uri: string): Promise<{
 			status: 'ok';
 			res: Note | null;
@@ -184,7 +184,7 @@ export async function createNote(value: string | IObject, resolver: Resolver, si
 			}
 		};
 
-		const uris = unique([note._misskey_quote, note.quoteUrl].filter((x): x is string => typeof x === 'string'));
+		const uris = unique([note._misskey_quote, note.quoteUri].filter((x): x is string => typeof x === 'string'));
 		const results = await Promise.all(uris.map(uri => tryResolveNote(uri)));
 
 		quote = results.filter((x): x is { status: 'ok', res: Note | null } => x.status === 'ok').map(x => x.res).find(x => x);
diff --git a/packages/backend/src/remote/activitypub/renderer/index.ts b/packages/backend/src/remote/activitypub/renderer/index.ts
index bf31c2227..37e73d37b 100644
--- a/packages/backend/src/remote/activitypub/renderer/index.ts
+++ b/packages/backend/src/remote/activitypub/renderer/index.ts
@@ -21,12 +21,14 @@ export const renderActivity = (x: any): IActivity | null => {
 				manuallyApprovesFollowers: 'as:manuallyApprovesFollowers',
 				sensitive: 'as:sensitive',
 				Hashtag: 'as:Hashtag',
-				quoteUrl: 'as:quoteUrl',
 				// Mastodon
 				toot: 'http://joinmastodon.org/ns#',
 				Emoji: 'toot:Emoji',
 				featured: 'toot:featured',
 				discoverable: 'toot:discoverable',
+				// Fedibird
+				fedibird: 'http://fedibird.com/ns#',
+				quoteUri: 'fedibird:quoteUri',
 				// schema
 				schema: 'http://schema.org#',
 				PropertyValue: 'schema:PropertyValue',
diff --git a/packages/backend/src/remote/activitypub/renderer/note.ts b/packages/backend/src/remote/activitypub/renderer/note.ts
index 62dc9ebc4..0d53cfe5e 100644
--- a/packages/backend/src/remote/activitypub/renderer/note.ts
+++ b/packages/backend/src/remote/activitypub/renderer/note.ts
@@ -141,7 +141,7 @@ export default async function renderNote(note: Note, dive = true, isTalk = false
 			mediaType: 'text/x.misskeymarkdown',
 		},
 		_misskey_quote: quote,
-		quoteUrl: quote,
+		quoteUri: quote,
 		published: note.createdAt.toISOString(),
 		to,
 		cc,
diff --git a/packages/backend/src/remote/activitypub/type.ts b/packages/backend/src/remote/activitypub/type.ts
index de7eb0ed8..f5b411639 100644
--- a/packages/backend/src/remote/activitypub/type.ts
+++ b/packages/backend/src/remote/activitypub/type.ts
@@ -111,7 +111,7 @@ export interface IPost extends IObject {
 		mediaType: string;
 	};
 	_misskey_quote?: string;
-	quoteUrl?: string;
+	quoteUri?: string;
 	_misskey_talk: boolean;
 }
 
@@ -122,7 +122,7 @@ export interface IQuestion extends IObject {
 		mediaType: string;
 	};
 	_misskey_quote?: string;
-	quoteUrl?: string;
+	quoteUri?: string;
 	oneOf?: IQuestionChoice[];
 	anyOf?: IQuestionChoice[];
 	endTime?: Date;