Additional car parking spaces will be made available for the two Fratton fixtures against Burton and Doncaster.
Pompey host Buton on Tuesday, February 8, while Doncaster visit the south coast on Saturday, February 12.
The initial allocation of parking spaces for these fixtures sold out quickly, but more will be available to purchase from 5pm on Monday (February 7).
Supporters should note that all parking must now be pre-booked online here, with no spaces available to buy on the day.
Spaces are priced £10 per car (or £5 per car for those fans with a valid blue badge).
Match tickets for both games are still to available to buy online here or from the Anson Road ticket office.