Change your Minecraft server version
- Sign in to your dashboard from the client area or directly at https://game.polisystems.ch.
- Click Manage on your Minecraft server.

- If this is the first launch, start the server once so it can generate the world and prompt you to accept the EULA.

Tip: letting the initial generation finish avoids chunk or save issues when you change versions.
- When the server shows ON, open Configuration → Advanced.

- Select the edition and version you want (for example Spigot 1.15.2) and click Install edition.

- Wait 10–20 seconds, then start the server again and enjoy the new version.