Project Zomboid Update — Mod Compatibility Status & Broken Mods List
🧠 What This Means for Modders
42.20.4 STABLE & 42.19.2 UNSTABLE & 41.78.21 LEGACY Hotfixes Released — a general update — most mods survive, but check the broken list below. Roll-back guide →
📋 Patch Notes
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 [url=https://theindiestone.com/forums/forum/85-bug-reports/]here[/url]. [h3]FIXES[/h3] [list] [*]Fixed security vulnerabilities. [list] [*]Mod makers should be aware that as part of this fix, the loadstring and loadstream methods have been removed. If your mods used these methods you will need to update your mods. If you were using these methods to execute code sent from the server, then you will need to create the necessary methods and call them by sending the appropriate commands. If you are unable to replace these methods in your case, please report the issue in the #mod_portal channel of [url=https://discord.gg/theindiestone]The Official Project Zomboid Discord server[/url], explaining how you were using them [/list] [/list] [i]As always, discussions regarding this update can be found pinned to the Project Zomboid Discussions Forums [url=https://steamcommunity.com/app/108600/discussions/0/582806564883169058/]here[/url][/i].
✅ Mods Updated for This Patch (0)
These mods were updated after the patch — safe to use on the current version.
None yet.
⚠️ Mods That May Be Broken (0)
These native mods may not work until the author updates them. Everything else is unaffected — .esp, texture, and Papyrus-script mods are version-independent and survive patches.
None yet.
↩️ How to Roll Back / Downgrade
Steam: open the Steam console (steam://nav/console) and run `download_depot <appid> <depotid> <manifestid>` to download the pre-update build, then copy those files over the updated ones. Set the game to "only update when I launch" (Properties → Updates). Always back up the game folder before a patch.
🕘 Previous Updates
Older Project Zomboid updates — click to read each patch note.