Sony has released PS4 system update version 1.52, which it says "improves system software stability."
Users who have enabled Auto Downloads and left their console in standby mode should have the update upon next booting up their console.
Earlier this week Sony said it was investigating a growing number of cases of PS4 players being locked out of online games in titles including Killzone Shadow Fall, Call of Duty Ghosts and Battlefield 4.
Affected users receive an error message warning them that they require a PlayStation Plus subscription to play online, even if they have one.
Having debuted in North America on November 15, Sony said on December 3 that worldwide PS4 sales stood at 2.1 million.
Read CVG's PS4 review for an in-depth launch analysis of the machine.