Minecraft Java Edition 1.20.5 Release Candidate 1 changelog

This week's shipping frenzy continues with our very first Release Candidate for 1.20.5! Barring any significant or critical issues found within it, this is the version we are planning to ship as Minecraft: Java Edition 1.20.5 next week.

TECHNICAL CHANGES

• Changed the approach to game client disconnecting on invalid data in packets sent from a server
  • To ease the transition period, modded servers can opt out by setting the appropriate field in the handshake/game_profile packet
  • This option will be removed in the next release

FIXED BUGS IN 1.20.5 RELEASE CANDIDATE 1

• MC-270867 - Severe lag when upgrading 1.20.4 worlds
• MC-270871 - Upgrading a world with horses wearing leather horse armor makes the horse immune to freezing forever

GET THE RELEASE CANDIDATE

Release Candidates are available for Minecraft: Java Edition. To install the Release Candidate, open up the Minecraft Launcher and enable snapshots in the "Installations" tab.

Testing versions can corrupt your world, so please backup and/or run them in a different folder from your main worlds.

Cross-platform server jar:

• Minecraft server jar

Report bugs here:

• Minecraft issue tracker!

Want to give feedback?

• For any feedback and suggestions on our upcoming 1.21 features, head over to the dedicated Feedback site category. You can also leave any other feedback on the Feedback site. If you're feeling chatty, join us over at the official Minecraft Discord.