> For the complete documentation index, see [llms.txt](https://docs.nitrosetups.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nitrosetups.com/docs/setup-guides/ultimate-setups/update-guides/update-or-1.21.11-to-26.1.2.md).

# Update | 1.21.11 to 26.1.2

{% hint style="info" %}
Update released: 16th August 2026
{% endhint %}

<mark style="color:orange;">**Start by downloading the latest version of the setup you are using on BuiltByBit.**</mark>

<mark style="color:red;">**Before completing all the step below, please STOP your server to avoid any file corruption!**</mark>

***

## 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 26.1.2 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. Migrating to new world format

From the 26.1 update, PaperMC have changed how they save worlds by putting all dimensions inside the main world folder.

The Multiverse-Core plugin should migrate this automatically on the first startup on 26.1.2. But you should save a backup of your world folders before updating.

***

## 4. Updating the Resourcepack

The Minecraft 26.1.2 update forced us to change how the custom 2D Head texture works. For this reason, you have to update the resourcepack on your server.

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:

* [ItemsAdder](/docs/setup-guides/ultimate-setups/resource-pack/itemsadder-optional.md)
* [Nexo](/docs/setup-guides/ultimate-setups/resource-pack/nexo-optional.md)

***

## 5. Updating the Skript files

In a recent update of the Skript plugin, the WorldGuard integration within the Skript plugin was removed and a new **skript-worldguard** addon has been released. You can download the plugin below to install it on your server.

{% file src="/files/qsI2Vlwhle9NpwIB9S2P" %}

Below are all the Skript files that need to be updated to support Skript 2.15.3. Delete these files at this filepath and replace them with the same ones from the latest version of the setup: `plugins > Skript > scripts`

* afk.sk
* aldoria\_dangerzones.sk
* dungeons.sk
* messages.sk
* pvp.sk
* rtp.sk

***

## 6. Migrating from CoinsEngine to ExcellentEconomy

In a recent update, the CoinsEngine plugin was renamed to ExcellentEconomy. Follow these setups to migrate from CoinsEngine to ExcellentEconomy:

1. Delete the CoinsEngine JAR on your server and upload the ExcellentEconomy JAR from the latest version of the setup.
2. Rename your CoinsEngine plugins folder to `ExcellentEconomy`.
3. Change all `coinsengine_balance` placeholders on your server to `excellenteconomy_balance`. The easiest way to do this is to use a Replace In All Files tool founds in apps like VSCode.

***

## 7. Migrating from Themis to GrimAC

In the 26.1.2 update of our setups, we have decided to switch from Themis to GrimAC as the anticheat plugin in the setup.

The migrate, simply delete the Themis plugin JAR and folder on your server, and upload the GrimAC JAR from the latest version of the setup.

***

## Update Completed

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