Chapter 15. Upgrading and Migrating

Comprehensive upgrade instructions can be found in docs/UPGRADE. As with any major administration task, it is strongly suggested that you back up your complete installation before beginning. Upgrading is a two-step process:

  1. The code must first be upgraded. This will involve downloading a new copy of OJS, or downloading and installing a patch file. Both the full OJS package and the relevant patch file are available from

  2. The database must be upgraded. This can be done using the tools/upgrade.php script.

See docs/UPGRADE for complete instructions.

If the installation has been customized in any way, it will be necessary to ensure that the customizations are properly migrated to the new version: