diff --git a/CHANGES.txt b/CHANGES.txt
index 64ad337..d4bbf00 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -26,13 +26,23 @@ Changes
 - Drop support for Python 2.7 and Python 3.4. Require Python 3.5+ from now on.
   [aleksihakli]
 
-- Drop old single-argument signature format for ``AXES_USERNAME_CALLABLE``.
-  [aleksihakli]
-
 - Improve tests and raise Codecov monitoring threshold to 90%.
   [aleksihakli]
 
-- Add ``AXES_NEVER_LOCKOUT_GET`` flag that allows skipping checks on GET requests.
+- Add support for string import for ``AXES_USERNAME_CALLABLE`` that supports dotted paths
+  in addition to the old callable type such as a function or a class method.
+  [aleksihakli]
+
+- Drop old single-argument signature format for ``AXES_USERNAME_CALLABLE``.
+  From now on, the callable needs to accept two arguments, the HttpRequest and credentials
+  that are supplied to the Django ``authenticate`` method in authentication backends.
+  [aleksihakli]
+
+- Add ``AXES_NEVER_LOCKOUT_GET`` setting that allows skipping checks on GET requests.
+  [aleksihakli]
+
+- Add ``AXES_CLIENT_IP_ATTRIBUTE`` that defines where Axes fetches from and stores
+  client IP addresses in the request object throughout the request - response cycle.
   [aleksihakli]
 
 
diff --git a/docs/configuration.rst b/docs/configuration.rst
index 14ec20c..6b24b23 100644
--- a/docs/configuration.rst
+++ b/docs/configuration.rst
@@ -249,8 +249,10 @@ These should be defined in your ``settings.py`` file.
   Default: ``True``
 * ``AXES_USERNAME_FORM_FIELD``: the name of the form field that contains your
   users usernames. Default: ``username``
-* ``AXES_USERNAME_CALLABLE``: A callable function that takes two arguments:
-  ``AXES_USERNAME_CALLABLE(request, credentials)``.
+* ``AXES_USERNAME_CALLABLE``: A callable or a string path to function that takes
+  two arguments for user lookups: ``def get_username(request: HttpRequest, credentials: dict) -> str: ...``.
+  This can be any callable such as ``AXES_USERNAME_CALLABLE = lambda request, credentials: 'username'``
+  or a full Python module path to callable such as ``AXES_USERNAME_CALLABLE = 'example.get_username``.
   The ``request`` is a HttpRequest like object and the ``credentials`` is a dictionary like object.
   ``credentials`` are the ones that were passed to Django ``authenticate()`` in the login flow.
   If no function is supplied, Axes fetches the username from the ``credentials`` or ``request.POST``
@@ -268,6 +270,8 @@ These should be defined in your ``settings.py`` file.
   Default: ``False``
 * ``AXES_NEVER_LOCKOUT_WHITELIST``: If ``True``, users can always login from whitelisted IP addresses.
   Default: ``False``
+* ``AXES_CLIENT_IP_ATTRIBUTE``: A string that is used to lookup and set client IP on the request object. Default: ``'axes_client_ip'``
+* ``AXES_IP_BLACKLIST``: An iterable of IPs to be blacklisted. For example: ``AXES_IP_BLACKLIST = ['0.0.0.0']``. Default: ``None``
 * ``AXES_IP_WHITELIST``: An iterable of IPs to be whitelisted. For example: ``AXES_IP_WHITELIST = ['0.0.0.0']``. Default: ``None``
 * ``AXES_DISABLE_ACCESS_LOG``: If ``True``, disable all access logging, so the admin interface will be empty. Default: ``False``
 * ``AXES_DISABLE_SUCCESS_ACCESS_LOG``: If ``True``, successful logins will not be logged, so the access log shown in the admin interface will only list unsuccessful login attempts. Default: ``False``