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Update | 1.21.4 to 1.21.8

This guide explains how to update any of our Ultimate setups from 1.21.4 to 1.21.8. If your setup is currently on 1.21.4, this is the guide you should follow.

Update released: 25th September 2025

Start by downloading the latest version of the setup you are using on BuiltByBit.

Before completing all the step below, please STOP your server to avoid any file corruption!

1. Updating the JAR

The first step is to update your server JAR. We recommend using Paper, so make sure to update to the latest 1.21.8 version of PaperMC: https://papermc.io/

2. Updating the Plugins

The next step is to update all plugins in the setup. The easiest way is to download the latest version of your setup from BuiltByBit. Then, delete the existing plugins on your server (except for any you added yourself) and upload the plugins from the latest setup version.

You also have to update all dependencies.

3. Updating the Resourcepack

In Minecraft 1.21.8, major changes were made to shaders in resourcepacks. Because of this, we’ve updated the shaders in the setup resourcepack.

By default, our setups use the ForcePack plugin to handle the resourcepack. In this case, simply update the config.yml by replacing the file on your server at: plugins > ForcePack > config.yml with the one from the latest version of the setup.

If you’re using ItemsAdder or Nexo, download the latest version of our premade folder for ItemsAdder/Nexo here:

4. Migrating to Multiverse-Core V5 (Optional)

With the 1.21.8 update, we’ve migrated the Multiverse-Core plugin to V5, as the plugin was recently rewritten. This step is optional, but recommended.

To migrate, delete the Multiverse-Core plugin folder on your server and replace it with the one from the latest setup version. Then update the plugin itself.

Next, adjust the placeholders by replacing the following files with the updated versions from the latest setup:

  • plugins > Skript > scripts > bossbar.sk

  • plugins > Skript > scripts > customitems.sk

  • plugins > Skript > scripts > map.sk

Finally, delete the following file:

  • plugins > PlaceholderAPI > expansions > Expansion-multiverse.jar

Update Completed

You’ve finished all steps. If anything isn’t working as expected, please contact us on Discord.

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