How to Update an FTB Skies Server | Safer 2026 Guide
FTB Skies updates have fixed real, specific bugs over time — not just added content — which makes the official server pack and a quick changelog read worth the extra two minutes.
Already crash-looping? See the FTB Skies crash-fix guide, or the FTB Skies pack page.
1. Back up before updating
Skyblock progression — island builds, resource automation — lives in the world save. Take a full backup before touching the pack files.
2. Use the official server pack, not hand-copied client files
Download the server pack for your target version from CurseForge or the FTB App directly. Some FTB Skies mods are client-only, and manually copying files from a client update into the server's mods folder is a documented way to introduce crashes.
3. Confirm NeoForge and Java 17
The server pack bundles the correct NeoForge build, but it's worth confirming Java 17 is still what's running after any update — a server that won't start post-update is usually this.
4. Check for the quest and End-dimension fixes
If you were avoiding the Sky Castle quest or entering The End due to a known crash, check the changelog for your target version — both have had documented fixes in past releases.
FAQ
Should I just copy new mod files from the client over to my server?+
No — some FTB Skies mods are client-only, and mixing client files into the server's mods folder is a documented crash cause. Always use the official server pack for the target version instead.
Will an update fix a quest-related crash?+
Possibly — the Sky Castle quest has had a documented crash bug in some releases. Check the changelog for your target version before assuming it's unrelated to your issue.
What's the single most important check after updating?+
That Java 17 and the correct NeoForge build are still in place — a server that fails to start after an update is almost always this, not a deeper problem.
Update FTB Skies on a host that uses the official server pack
CoalHost keeps automatic backups ahead of every update and always deploys the official FTB Skies server pack, avoiding the client-file mixing trap.
View FTB Skies Hosting →