Highlights / Notes
Java 25 now required & Minecraft 26.1 support added.

Upgrading from 5.16

• Make sure you are using Java 25
  
• Replace the bluemap.jar-file with the new one

Changelog since 5.16

• Switched to Java 25
• Added support for Minecraft 26.1 world format changes
• Switched to virtual-threads based webserver implementation
• Stopped using temporary cache-files for image-writing
• Fixed chunks not rendering if their timestamp is 0
• Fixed a rare race-condition which could cause a server-crash
• Fixed large textures with CUSTOM format freezing bluemaps loading

Full Changelog
https://github.com/BlueMap-Minecraft/BlueMap/releases/tag/v5.17