42.20.1 STABLE Hotfix Released — Project Zomboid Steam update #1519162

While this update should not break saves, if you encounter any bugs please ensure you can replicate them on a fresh save with no mods installed before...

Steam App
Project Zomboid (108600)
Event type
patch note
Published
5 August 2026 - 08:07:30 UTC
Source
steam_community_announcements
While this update should not break saves, if you encounter any bugs please ensure you can replicate them on a fresh save with no mods installed before reporting them to our team here. MP Improved Lua checksum validation for multiplayer anti-cheat Fixed an issue that caused significant performance problems with chunk unloading on multiplayer servers This should fix most of the bugs players were getting on high-pop servers due to server lag Fixed errors and crashes that could occur when selecting Multiplayer while certain languages were selected Fixed an issue where vehicles could temporarily disappear for players after another player disconnected Fixed an issue that would allow broken B41 worlds to be hosted on B42 servers Fixed an issue where players switching from b41 to B42 could be met with a missing menu FIXES Improved memory usage by reusing discarded world data Fixed a memory leak ...

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