diff --git a/src/remote/activitypub/type.ts b/src/remote/activitypub/type.ts
index 76d7ff59c9..59495d7891 100644
--- a/src/remote/activitypub/type.ts
+++ b/src/remote/activitypub/type.ts
@@ -99,7 +99,7 @@ interface IQuestionChoice {
 	_misskey_votes?: number;
 }
 
-export const validActor = ['Person', 'Service'];
+export const validActor = ['Person', 'Service', 'Group', 'Organization'];
 
 export interface IPerson extends IObject {
 	type: 'Person';