* [PostgreSQL](https://www.postgresql.org) (9.3+)
* [PostGIS](https://postgis.net) (2.2+)
* [Python 3](https://www.python.org/) (3.5+)
- * [Psycopg2](https://www.psycopg.org)
+ * [Psycopg2](https://www.psycopg.org) (2.7+)
* [Python Dotenv](https://github.com/theskumar/python-dotenv)
* [PHP](https://php.net) (7.0 or later)
* PHP-pgsql