* [PyYaml](https://pyyaml.org/) (5.1+)
* [datrie](https://github.com/pytries/datrie)
-When running the PHP frontend:
-
- * [PHP](https://php.net) (7.3+)
- * PHP-pgsql
- * PHP-intl (bundled with PHP)
-
For running continuous updates:
* [pyosmium](https://osmcode.org/pyosmium/)
-For running the experimental Python frontend:
+For running the Python frontend:
* one of the following web frameworks:
* [falcon](https://falconframework.org/) (3.0+)
* [starlette](https://www.starlette.io/)
* [uvicorn](https://www.uvicorn.org/)
+For running the legacy PHP frontend:
+
+ * [PHP](https://php.net) (7.3+)
+ * PHP-pgsql
+ * PHP-intl (bundled with PHP)
+
+
For dependencies for running tests and building documentation, see
the [Development section](../develop/Development-Environment.md).