Missing mod dependencies

Possible causes

• A mod needs a library mod that is not installed.
• The library is installed but its version is too old or too new.
• The library is for a different loader or Minecraft version.

How to identify the cause

• Fabric says "requires any version of X, which is missing" and names the mod that needs it.
• Forge and NeoForge show "Missing or unsupported mandatory dependencies" followed by each mod ID and the version range it needs.
• Use the dependency finder to see what each mod in our library needs.

Step-by-step fix

1. 1Note the dependency name and version range from the error.
2. 2Download that dependency from its official page for your Minecraft version and loader.
3. 3Put it in the mods folder with the mod that needs it.
4. 4If the error says the version is wrong, replace the dependency with a version inside the range shown.
5. 5Launch again; repeat if a second dependency is reported.

If that did not work

• Launchers such as Prism Launcher and the Modrinth App can install required dependencies automatically when you add a mod through them.

Affected versions

All modded Minecraft versions.

Frequently asked questions