Thanks for your patience @Julian_Kallidat. This process is slightly complicated because Bitnami doesn’t intend for their packages to be upgradable, but we’ve worked around that. 
If you’re not using mongodb, you can just add: —ignore-platform-reqs to the end of the composer install step.
Example: hp composer.phar install --no-dev --ignore-platform-reqs
If you’re using mongodb then you have to install the mongodb driver.
This covers these Bitnami scenarios:
- Bitnami for Windows, Bitnami VM or Cloud Image
- Does not cover Bitnami packaged installers for Linux or Mac
If you need the driver for that, I’d say download the the 2.2.1 Bitnami installer for your particular env and get the driver file out of it. Or, you can just use packager to export your instance and import it into a new install.
Let me know if this makes sense, and works for you.
Thanks,
@AlexBowen