diff --git a/docs/rolereference.rst b/docs/rolereference.rst
index d6533036d645a4279c6886532bc37b42dd91ea7e..0676d0f631faed9a5c2ffd98860e95dad643df81 100644
--- a/docs/rolereference.rst
+++ b/docs/rolereference.rst
@@ -1900,6 +1900,13 @@ Parameters
   <https://github.com/jazzband/pip-tools>`_ (the ``pip-compile`` utility) with
   ``gunicorn`` and ``futures`` in the ``.in.`` file.
 
+**wsgi_requirements_in** (list, optional, ``[ futures, gunicorn ]``)
+  List of top level packages to use when performing the pip
+  requirements upgrade checks for the Gunicorn requirements (listed
+  via ``wsgi_requirements`` parameter). For Python 3-based websites,
+  it should be sufficient to list only ``gunicorn`` (``futures`` is
+  required for Python 2).
+
 
 Distribution compatibility
 ~~~~~~~~~~~~~~~~~~~~~~~~~~