diff --git a/CHANGELOG.md b/CHANGELOG.md
index a43b4cef2..778764bd9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 0.0.8(wip)
+- add type definition for `messagingMessage` event to main stream channel
+
 # 0.0.7
 - Notificationsの型を修正
 - MessagingMessageの型を修正
diff --git a/src/streaming.types.ts b/src/streaming.types.ts
index 52f840577..1e8f9db9a 100644
--- a/src/streaming.types.ts
+++ b/src/streaming.types.ts
@@ -16,6 +16,7 @@ export type Channels = {
 			meUpdated: (payload: MeDetailed) => void;
 			pageEvent: (payload: PageEvent) => void;
 			urlUploadFinished: (payload: { marker: string; file: DriveFile; }) => void;
+			messagingMessage: (payload: MessagingMessage) => void;
 			readAllNotifications: () => void;
 			unreadNotification: () => void;
 			unreadMention: () => void;