-PyDERASN depends on `six <https://pypi.org/project/six/>`__ package
-for keeping compatibility with Py27/Py35. It is included in the tarball.
-You can also find it mirrored on :ref:`download <download>` page.
-``termcolor`` is an optional dependency used for output colourizing.
-``urwid`` is an optional dependency used for :ref:`interactive browser <browser>`.
-
-You could use pip (**no** OpenPGP authentication is performed!) with PyPI::
-
- $ cat > requirements.txt <<EOF
- pyderasn==8.4 --hash=sha256:TO-BE-FILLED
- six==1.15.0 --hash=sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259
- EOF
- $ pip install --requirement requirements.txt
+* ``termcolor`` is an optional dependency used for output colourizing.
+* ``urwid`` is an optional dependency used for :ref:`interactive browser <browser>`.
+* ``dateutil`` is an optional dependency used for ``.totzdatetime()`` method.