Simply follow the guide available here . For this update, please update your package with pip, then follow the specific instructions and ounce done apply migration. This is especially important if you have modoboa-pdfcredentials, modoboa-dmarc and/or modoboa-imap-migration.
Don't forget to update the new-admin interface as well !
Modoboa has implemented the Github sponsor functionality. Don't hesitate to donate if you like the project!
You can donate here !
The modoboa team