* [bzip2](http://www.bzip.org/)
* [zlib](https://www.zlib.net/)
* [ICU](http://site.icu-project.org/)
+ * [nlohmann/json](https://json.nlohmann.me/)
* [Boost libraries](https://www.boost.org/), including system and filesystem
* PostgreSQL client libraries
* a recent C++ compiler (gcc 5+ or Clang 3.8+)
* [Python Dotenv](https://github.com/theskumar/python-dotenv)
* [psutil](https://github.com/giampaolo/psutil)
* [Jinja2](https://palletsprojects.com/p/jinja/)
- * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4+ with greenlet support)
- * [GeoAlchemy2](https://geoalchemy-2.readthedocs.io/) (0.10+)
+ * [SQLAlchemy](https://www.sqlalchemy.org/) (1.4.31+ with greenlet support)
* [asyncpg](https://magicstack.github.io/asyncpg) (0.8+)
* [PyICU](https://pypi.org/project/PyICU/)
* [PyYaml](https://pyyaml.org/) (5.1+)
* [PHP](https://php.net) (7.3+)
* PHP-pgsql
* PHP-intl (bundled with PHP)
- * PHP-cgi (for running queries from the command line)
For running continuous updates:
* one of the following web frameworks:
* [falcon](https://falconframework.org/) (3.0+)
- * [sanic](https://sanic.dev) and (optionally) [sanic-cors](https://github.com/ashleysommer/sanic-cors)
* [starlette](https://www.starlette.io/)
- * [uvicorn](https://www.uvicorn.org/) (only with falcon and starlette framworks)
+ * [uvicorn](https://www.uvicorn.org/)
For dependencies for running tests and building documentation, see
the [Development section](../develop/Development-Environment.md).