Need to put some more money on your SmarTrip card? You might want to do it tomorrow — over the weekend, a number of SmarTrip functions won’t be available as WMATA conducts software upgrades.

On Saturday, riders reloading with credit cards will only be able to put up to $20 on their SmarTrip at Metrorail stations, while debit cards won’t be accepted. (Cash transactions will still be available in any denomination at kiosks on Saturday.) Then, on Sunday, point-of-sale SmarTrip transactions — that is, ones at retail locations — will be cash-only. And for those who get a transit benefit from their employer, SmartBenefits will not be accessible all day Sunday.

Everything should be back to normal at 12:01 a.m. on Monday.