The following guides will help you upgrade your project or module to SilverStripe 4. Upgrading a module is very similar to upgrading a Project. The module upgrade guide assumes familiarity with the project upgrade guide.

Upgrading to SilverStripe 4
Upgrade your project SilverStripe 4 and keep it up to date with the latest fixes, security patches and new features.
Upgrading a module
Upgrade your module to be compatible with SilverStripe 4 and make it easy for your users to upgrade.