Is your feature request related to a problem? Please describe.
The mod currently does not support Minecraft 1.21.1, which limits compatibility for users and servers that have already updated to that version. While 1.21.1 is not the absolute latest, it’s a stable target for many modpacks and communities right now.

Describe the solution you'd like
An update of the mod to Minecraft 1.21.1, ensuring compatibility with its Forge version. Not expecting bleeding-edge support, just alignment with a commonly adopted release.

Describe alternatives you've considered
Downgrading the game or holding off on using the mod until it catches up, but both are less than ideal. Forking and maintaining a local update is also possible but introduces maintenance overhead and compatibility risk.

Additional context
I noticed that @DarkPred is listed as the maintainer for one of the key Forge dependencies (More Hitboxes), which might help smooth over any migration hurdles. I’m also willing to throw myself at the update work if assistance is needed. Mostly putting this out there to ask if there are already any plans in motion to move forward a few versions.