diff --git a/CHANGELOG.md b/CHANGELOG.md
index e9e2792a..61e7738c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,16 @@
 <!-- This file is generated, please add to it using `knope document-change` in the client-library-templates repo -->
 # Changelog
 
+## 3.23.0 (2026-10-28)
+
+### Features
+
+#### Use Billing Requests instead of Redirect Flows and Payer Authorisations
+
+Redirect Flows and Payer Authorisations are legacy APIs and cannot be used by new integrators. If you use `client.redirect_flows` and `client.payer_authorisations`, migrate to [Billing Requests](https://developer.gocardless.com/api-reference/#billing-requests), which cover the same flows (and more) through a single API. The [integration planner](https://docs.gocardless.com/docs/collect-payments/integration-planner) is a good place to start.
+
+The legacy methods are now marked as deprecated with a `DeprecationWarning` at runtime and a `Deprecated:` docstring note. Behaviour is unchanged. Python hides `DeprecationWarning` by default outside `__main__` and test runners, but projects running with `-W error` will see these calls fail until they migrate.
+
 ## 3.22.0 (2026-10-26)
 
 ### Features
diff --git a/gocardless_pro/__init__.py b/gocardless_pro/__init__.py
index 9fbd0853..904e34b1 100644
--- a/gocardless_pro/__init__.py
+++ b/gocardless_pro/__init__.py
@@ -2,5 +2,5 @@
 
 from .client import Client
 
-__version__ = '3.22.0'
+__version__ = '3.23.0'
 
diff --git a/gocardless_pro/api_client.py b/gocardless_pro/api_client.py
index 4858ed69..b336e4ab 100644
--- a/gocardless_pro/api_client.py
+++ b/gocardless_pro/api_client.py
@@ -201,7 +201,7 @@ def _default_headers(self):
             'Authorization': 'Bearer {0}'.format(self.access_token),
             'Content-Type': 'application/json',
             'GoCardless-Client-Library': 'gocardless-pro-python',
-            'GoCardless-Client-Version': '3.22.0',
+            'GoCardless-Client-Version': '3.23.0',
             'User-Agent': self._user_agent(),
             'GoCardless-Version': '2015-07-06',
         }
@@ -210,7 +210,7 @@ def _user_agent(self):
         python_version = '.'.join(platform.python_version_tuple()[0:2])
         vm_version = '{}.{}.{}-{}{}'.format(*sys.version_info)
         return ' '.join([
-            'gocardless-pro-python/3.22.0',
+            'gocardless-pro-python/3.23.0',
             'python/{0}'.format(python_version),
             '{0}/{1}'.format(platform.python_implementation(), vm_version),
             '{0}/{1}'.format(platform.system(), platform.release()),
diff --git a/setup.py b/setup.py
index da063a65..2fe59c8c 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name = 'gocardless_pro',
-    version = '3.22.0',
+    version = '3.23.0',
     packages = find_packages(exclude=['tests']),
     install_requires = ['requests>=2.34.2'],
     python_requires = '>=3.6',