After 26.1 in March and 26.2 Chaos Cubed in June, Mojang delivers the third major update of 2026 with 26.3. Each update brings new possibilities, but also new challenges for server administrators. This article covers what to expect and, more importantly, how to prepare your server.
The 2026 update pace
Mojang follows a faster release schedule in 2026 than in previous years. Three major updates in six months keeps the game exciting, but it also puts pressure on server owners. Plugins, mods and server software all need updating each time. Anyone who updates automatically without preparation risks downtime or data loss.
Preparing your server
Regardless of the specific content in the update, the same preparation steps apply to every major Minecraft release:
1. Make a full backup
Copy your entire server directory: worlds, plugins, configurations and player data. Also test whether your backup actually works by loading it on a test server. A backup you have never tested is not a real backup.
2. Check your server software
Paper, Purpur and other server implementations do not always release on the same day as a Minecraft update. Monitor the release channels of your server software. Paper typically delivers a compatible version within a few days, but larger internal changes can take longer.
3. Check your Java version
Minecraft 26.x requires Java 25. If your server still runs an older Java version, the new Minecraft version will not work. Check your Java version with java -version and update if needed. With managed hosting like HostValues, the correct Java version is provided automatically.
4. Inventory your plugins
Make a list of all your plugins and check whether each developer has confirmed compatibility with 26.3. Plugins that use Minecraft's internal API (NMS) break almost always on a major update. Plugins that only use the Bukkit/Paper API usually survive updates without issues.
Prioritize essential plugins (permissions, protection, economy) over cosmetic ones. If a critical plugin has not been updated yet, wait to update or find an alternative.
5. Test on a separate server
Set up a test server with the new version, your world and your plugins. Play for an hour and test all important functions: permissions, shops, teleportation, protected regions. Problems you find here are ones you prevent on your production server.
World generation and new content
Major updates often bring new biomes, blocks or structures. These only appear in newly generated chunks. Areas players have already explored do not change. If you want players to access the new content, consider temporarily expanding the world border or resetting the nether or end (they are smaller and easier to regenerate).
Mod compatibility
Running a modded server (Forge, NeoForge or Fabric)? Mods typically take longer to update than plugins. Large modpacks can lag weeks to months behind the latest Minecraft version. Wait to update until your mod loader and key mods are compatible. Never force an update when your modpack is not ready for it.
Should I update to 26.3 immediately?
Not necessarily. If your server runs stable on 26.2 and your players are satisfied, it is wise to wait a few days. This gives plugin developers time to confirm compatibility and fix any bugs in the initial release. Update when your server software and essential plugins are ready, not on the day Mojang releases the update.
Will my old worlds work with 26.3?
Yes, Minecraft worlds are backwards compatible. You can keep using your existing world after updating. New biomes and structures only appear in chunks that have not been generated yet. Existing builds and areas remain unchanged. Always make a backup before updating, just in case.
Why does 26.x require Java 25?
Mojang uses new Java features that are only available in Java 25. This improves performance and makes the game's code more efficient. As a server administrator you only need to ensure Java 25 or newer is installed. The switch is straightforward: download Java 25, install it and adjust your startup script to use the correct Java version if needed.
Want to update without worries? At HostValues Minecraft hosting we always run the latest Java version and help you through the update process.
