Here we go. New Release!!
It's as tested as it will get: Over 100 Servers are already using 1.5.4 (which is almost the same as 1.5.5)
Still, as always do a backup and expect the unexpected!

Highlights / Notes

• full 1.17 support
• Rewrite of the render-manager and map-updating: map updates are now directly based on file-changes and should be way more reliable now.
• much more

BlueMap will now render automatically, so you do not need to do /bluemap render ... anymore!
Just use /bluemap to see the render-progress

Read the full update notes:
https://github.com/BlueMap-Minecraft/BlueMap/releases/tag/v1.5.5