diff --git a/src/TaxisLibrary/taxis_client.py b/src/TaxisLibrary/taxis_client.py
index 64413fa..cc7e2e9 100644
--- a/src/TaxisLibrary/taxis_client.py
+++ b/src/TaxisLibrary/taxis_client.py
@@ -168,9 +168,9 @@ class OrderOut(BaseModel):
 
 
 class OrderNotificationsIn(BaseModel):
-    order: int
-    notify_side: OrderNotifySide
-    notify_type: OrderNotifyType
+    order_id: int
+    notify_side: OrderNotifySide = Field(default=OrderNotifySide.CLIENT)
+    notify_type: OrderNotifyType = Field(default=OrderNotifyType.DRIVER_ARRIVED)
     processed: Optional[bool] = False
 
 class OrderNotificationsOut(BaseModel):
@@ -416,7 +416,7 @@ class TaxisClient:
         return OrderNotificationsOut(**result)
 
     async def mark_order_notification_processed(self, notification_id: int, processed: bool) -> 'OrderNotificationsOut':
-        result = await self._request("PATCH", f"/order_notifications/{notification_id}/processed", params={"processed": processed})
+        result = await self._request("PATCH", f"/order_notifications/{notification_id}/processed", params={"processed": str(processed).lower()})
         return OrderNotificationsOut(**result)
 
     async def delete_order_notification(self, notification_id: int) -> None: