SQL update top1 row query

The query below is working:

update  top(1) ShipBillInfo 
set     shipfirstname='kkk' 
where   CustomerId='134';

but it is showing error if i try to order by some Id: for example:

update  top(1) ShipBillInfo 
set     shipfirstname='kkk' 
where   CustomerId='134' 
order by 
        OredrGUID desc;