diff --git a/src/types.ts b/src/types.ts
index d5cdaa0cf..144c7a13e 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -484,7 +484,7 @@ export type MessageResponse<
   silent?: boolean;
   status?: string;
   thread_participants?: UserResponse<UserType>[];
-  type?: string;
+  type?: MessageLabel;
   updated_at?: string;
 };
 
@@ -1676,6 +1676,14 @@ export type MessageBase<
   user_id?: string;
 };
 
+export type MessageLabel =
+  | 'deleted'
+  | 'ephemeral'
+  | 'error'
+  | 'regular'
+  | 'reply'
+  | 'system';
+
 export type Mute<UserType = UnknownType> = {
   created_at: string;
   target: UserResponse<UserType>;