diff --git a/backend/services/saxo_client.py b/backend/services/saxo_client.py
index e2007ef..6022bf1 100644
--- a/backend/services/saxo_client.py
+++ b/backend/services/saxo_client.py
@@ -150,7 +150,7 @@ def _snapshot_via_subscription(uic: int, asset_type: str = "StockOption") -> Dic
     body = {
         "ContextId": context_id,
         "ReferenceId": reference_id,
-        "Arguments": {"Uic": uic, "AssetType": asset_type, "AccountKey": get_default_account_key()},
+        "Arguments": {"Identifier": uic, "AssetType": asset_type, "AccountKey": get_default_account_key()},
         "RefreshRate": 5000,
     }
     resp = httpx.post(