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Forge version: 52.0.0 Minecraft version: 1.21.1 Downloads: Downloads page Note that as this is the start of a new version, it is recommended that you check the downloads page and use the latest version to receive any bug fixes, as the first ever build of Forge for any MC version is usually buggy. Intro: The first build for Forge 1.21.1 has been released! It is based on 51.0.33 for 1.21.0. We expect most existing 1.21.0 mods to work on 1.21.1 without needing any changes, as the only notable differences from Vanilla 1.21.0 -> 1.21.1 are a couple of new languages and a bugfix for an exploit that could be used to crash servers... as such, we strongly encourage all 1.21.0 players and mod developers to move to 1.21.1. From a mod dev perspective, BlockEntities now validate their block during construction - as long as that's fine you should be good to go. 1.21.0 has been moved to our minimal support tier, as explained in our tiered support policy - use 1.21.1 instead. If you find any issues, please let us know on the Discord. Sidenote: I'm sorry for not making these release posts for Forge betas of the past few MC versions. While I forgot to make some posts, we still released Forge builds for newer MC. When in doubt, check the sidebar on the files site. Same-day ports of Forge to new MC versions are common.