X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/fedc8ed4740686e396fb21c495d887d8ee23609a..f5e52e748f0a4275e3238e51c47de2ddccfea0ff:/docs/develop/Development-Environment.md

diff --git a/docs/develop/Development-Environment.md b/docs/develop/Development-Environment.md
index eba87c09..6bb33f00 100644
--- a/docs/develop/Development-Environment.md
+++ b/docs/develop/Development-Environment.md
@@ -1,6 +1,6 @@
 # Setting up Nominatim for Development
 
-This chapter gives an overview how to set up Nominatim for developement
+This chapter gives an overview how to set up Nominatim for development
 and how to run tests.
 
 !!! Important
@@ -32,7 +32,9 @@ It has the following additional requirements:
 * [behave test framework](https://behave.readthedocs.io) >= 1.2.6
 * [phpunit](https://phpunit.de) (9.5 is known to work)
 * [PHP CodeSniffer](https://github.com/squizlabs/PHP_CodeSniffer)
-* [Pylint](https://pylint.org/) (2.6.0 is used for the CI)
+* [Pylint](https://pylint.org/) (CI always runs the latest version from pip)
+* [mypy](http://mypy-lang.org/) (plus typing information for external libs)
+* [Python Typing Extensions](https://github.com/python/typing_extensions) (for Python < 3.9)
 * [pytest](https://pytest.org)
 
 The documentation is built with mkdocs:
@@ -50,9 +52,10 @@ To install all necessary packages run:
 
 ```sh
 sudo apt install php-cgi phpunit php-codesniffer \
-                 python3-pip python3-setuptools python3-dev pylint
+                 python3-pip python3-setuptools python3-dev
 
-pip3 install --user behave mkdocs mkdocstrings pytest
+pip3 install --user behave mkdocs mkdocstrings pytest \
+                    pylint mypy types-PyYAML types-jinja2 types-psycopg2
 ```
 
 The `mkdocs` executable will be located in `.local/bin`. You may have to add