Broker API Validation MarketOrderRequest

Alpaca Trading
1

I have been following the example provided in the docs shown here, but I keep running into the same errors which state:
ValidationError: 1 validation error for Order
commission
field required (type=value_error.missing)

Has anyone else encountered something similar/do you have a solution for this?
Here’s the code: (virtually taken directly from the example above, with the same module imports).

market_order_data = MarketOrderRequest(
                symbol="DOGE/USD",
                qty=1,
                side=OrderSide.BUY,
                time_in_force=TimeInForce.GTC,
                commission=1
        )

# Market order

market_order = broker_client.submit_order_for_account(
            account_id=account_id,
            order_data=market_order_data
            )

With the following errors

---------------------------------------------------------------------------
ValidationError                           Traceback (most recent call last)
<ipython-input-26-cf45673b0e09> in <module>()
     21 market_order = broker_client.submit_order_for_account(
     22             account_id=account_id,
---> 23             order_data=market_order_data
     24             )
     25 #except:

~/anaconda3/lib/python3.7/site-packages/alpaca/broker/client.py in submit_order_for_account(self, account_id, order_data)
   1515             return response
   1516 
-> 1517         return Order(**response)
   1518 
   1519     def get_orders_for_account(

~/anaconda3/lib/python3.7/site-packages/alpaca/trading/models.py in __init__(self, **data)
    184 
    185     def __init__(self, **data: Any) -> None:
--> 186         if "order_class" not in data or data["order_class"] == "":
    187             data["order_class"] = OrderClass.SIMPLE
    188 

~/anaconda3/lib/python3.7/site-packages/pydantic/main.cpython-37m-darwin.so in pydantic.main.BaseModel.__init__()

ValidationError: 1 validation error for Order
commission
  field required (type=value_error.missing)