diff --git a/scalable_sync.py b/scalable_sync.py
index 92bb039..45b8dbc 100644
--- a/scalable_sync.py
+++ b/scalable_sync.py
@@ -298,7 +298,7 @@ class WealthfolioMCP:
         payload = [
             {
                 "accountId": activity.account_id,
-                "date": activity.date,
+                "activityDate": activity.date,
                 "symbol": activity.symbol,
                 "activityType": activity.activity_type,
                 "quantity": activity.quantity,