diff --git a/src/remote/activitypub/type.ts b/src/remote/activitypub/type.ts
index b902abea23..8a7662e5a5 100644
--- a/src/remote/activitypub/type.ts
+++ b/src/remote/activitypub/type.ts
@@ -114,6 +114,10 @@ export interface IBlock extends IActivity {
 	type: 'Block';
 }
 
+export interface IUpdate extends IActivity {
+	type: 'Update';
+}
+
 export type Object =
 	ICollection |
 	IOrderedCollection |
@@ -127,4 +131,5 @@ export type Object =
 	IRemove |
 	ILike |
 	IAnnounce |
-	IBlock;
+	IBlock |
+	IUpdate;