Following on from the bizarre PlayStation 4 update 5.53-01, Sony has tonight released update 5.55 which is a little bit bigger than usual weighing in at 460MB. Hopefully your PS4 has been in rest mode, so it'll be downloaded and installed when you turn on your PS4 to play tonight. As always with smaller updates, this update doesn't introduce anything in the way of new features but it is set to to improve stability. System Software version 5.55 for the PlayStation 4 has been released today. This is a mandatory update and the following change will be made: \tThis system software update improves system performance.