diff --git a/docs/source/release-history.rst b/docs/source/release-history.rst
index e2594c89..bc98f4ae 100644
--- a/docs/source/release-history.rst
+++ b/docs/source/release-history.rst
@@ -2,35 +2,32 @@
 Release History
 ===============
 
-In Development
---------------
-
-Breaking Changes
-^^^^^^^^^^^^^^^^
+v0.4.3 (2023-09-26)
+-------------------
 
-N/A
+This is mainly a compatibility releae: it adds support for urllib3 v2.x and the next upcoming major release of Python, v3.12.0. It also adds support for multiple filters in :meth:`wayback.WaybackClient.search`. There are no breaking changes.
 
 
 Features
 ^^^^^^^^
 
-- You can now apply multiple filters to a search by using a list or tuple for the ``filter_field`` parameter of :meth:`wayback.WaybackClient.search`. (:issue:`119`)
+You can now apply multiple filters to a search by using a list or tuple for the ``filter_field`` parameter of :meth:`wayback.WaybackClient.search`. (:issue:`119`)
 
-  For example, to search for all captures at ``nasa.gov`` with a 404 status and “feature” somewhere in the URL:
+For example, to search for all captures at ``nasa.gov`` with a 404 status and “feature” somewhere in the URL:
 
-  .. code-block:: python
+.. code-block:: python
 
-     client.search('nasa.gov/',
-                   match_type='prefix',
-                   filter_field=['statuscode:404',
-                                 'urlkey:.*feature.*'])
+   client.search('nasa.gov/',
+                 match_type='prefix',
+                 filter_field=['statuscode:404',
+                               'urlkey:.*feature.*'])
 
 
 Fixes & Maintenance
 ^^^^^^^^^^^^^^^^^^^
 
 - Add support for Python 3.12.0. (:issue:`123`)
-- Add support for urllib3 v2.x. (:issue:`116`)
+- Add support for urllib3 v2.x (urllib3 v1.20+ also still works). (:issue:`116`)
 
 
 v0.4.3a1 (2023-09-22)
diff --git a/wayback/_client.py b/wayback/_client.py
index 216e94fb..3383f53f 100644
--- a/wayback/_client.py
+++ b/wayback/_client.py
@@ -605,10 +605,23 @@ def search(self, url, *, match_type=None, limit=1000, offset=None,
             assumed to be in UTC.
         filter_field : str or list of str or tuple of str, optional
             A filter or list of filters for any field in the results. Equivalent
-            to the ``filter`` argument in the CDX API. To apply multiple
-            filters, use a list of strings instead of a single string. Format:
-            ``[!]field:regex``, e.g. ``'!statuscode:200'`` to select only
-            captures with a non-200 status code.
+            to the ``filter`` argument in the CDX HTTP API. Format:
+            ``[!]field:regex`` or ``~[!]field:substring``, e.g.
+            ``'!statuscode:200'`` to select only captures with a non-2xx status
+            code, or ``'~urlkey:feature'`` to select only captures where the
+            SURT-formatted URL key has "feature" somewhere in it.
+
+            To apply multiple filters, use a list or tuple of strings instead of
+            a single string, e.g. ``['statuscode:200', 'urlkey:.*feature.*']``.
+
+            Regexes are matched against the *entire* field value. For example,
+            ``'statuscode:2'`` will never match, because all ``statuscode``
+            values are three characters. Instead, to match all status codes with
+            a "2" in them, use ``'statuscode:.*2.*'``. Add a ``!`` at before the
+            field name to negate the match.
+
+            Valid field names are: ``urlkey``, ``timestamp``, ``original``,
+            ``mimetype``, ``statuscode``, ``digest``, ``length``.
         collapse : str, optional
             Collapse consecutive results that match on a given field. (format:
             `fieldname` or `fieldname:N` -- N is the number of chars to match.)