diff --git a/src/tasks/model.ts b/src/tasks/model.ts
index 1358de3..b985a48 100644
--- a/src/tasks/model.ts
+++ b/src/tasks/model.ts
@@ -6,6 +6,7 @@ export interface Task {
   completed: boolean;
   completed_at: Date | null;
   group_id: string; // WhatsApp group ID where task was created
+  created_by: string; // WhatsApp user ID of task creator
 }
 
 export interface TaskAssignment {