As of June 2026, the latest stable branch is PrestaShop 9.1, with maintenance releases such as 9.1.3 available. (build.prestashop-project.org)
Major changes in PrestaShop 9
- New Hummingbird 2.0 default theme.
- Symfony 6.4 LTS framework.
- Support for PHP 8.1–8.5.
- New Admin API for integrations.
- Improved performance and security.
- Modernized back-office interface. (help-center.prestashop.com)
Should you upgrade?
If your store is on:
- PrestaShop 8.1 or 8.2: Upgrade planning should start now, but first verify module and theme compatibility.
- PrestaShop 1.7: Upgrading is strongly recommended for security and PHP compatibility reasons. (help-center.prestashop.com)
Before updating
- Full database and file backup.
- Test on a staging site first.
- Check all paid modules and theme compatibility.
- Use the official Update Assistant module.
- Verify custom overrides and custom modules. (help-center.prestashop.com)
For your situation
Since you develop and maintain PrestaShop stores and modules, I would recommend:
- New projects → PrestaShop 9.1
- Existing production stores on 8.x → Test thoroughly before upgrading.
- Stores with many third-party modules → Stay on the latest 8.x until all critical modules support 9.x. Community feedback indicates module compatibility is still the main upgrade challenge. (reddit.com)
Which version is your store currently running (1.7, 8.1, 8.2, or 9.x)? I can give a more specific upgrade path.