diff --git a/CHANGELOG.md b/CHANGELOG.md
index f1eeb49fd2..972887ef54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1 +1,2 @@
+- Notificationsの型を修正
 - MessagingMessageの型を修正
diff --git a/etc/misskey-js.api.md b/etc/misskey-js.api.md
index 362b73a99f..3095a7917c 100644
--- a/etc/misskey-js.api.md
+++ b/etc/misskey-js.api.md
@@ -2275,10 +2275,14 @@ type Notification_2 = {
     userId: User['id'];
 } | {
     type: 'groupInvited';
+    invitation: UserGroup;
+    user: User;
+    userId: User['id'];
 } | {
     type: 'app';
+    header?: string | null;
     body: string;
-    icon: string;
+    icon?: string | null;
 });
 
 // @public (undocumented)
diff --git a/src/entities.ts b/src/entities.ts
index 87c8134637..f21036d960 100644
--- a/src/entities.ts
+++ b/src/entities.ts
@@ -150,11 +150,15 @@ export type Notification = {
 	user: User;
 	userId: User['id'];
 } | {
-	type: 'groupInvited'; // TODO
+	type: 'groupInvited';
+	invitation: UserGroup;
+	user: User;
+	userId: User['id'];
 } | {
 	type: 'app';
+	header?: string | null;
 	body: string;
-	icon: string;
+	icon?: string | null;
 });
 
 export type MessagingMessage = {