diff --git a/releasenotes/notes/drop-python-39.yaml b/releasenotes/notes/drop-python-39.yaml
new file mode 100644
index 00000000..7d8ca21f
--- /dev/null
+++ b/releasenotes/notes/drop-python-39.yaml
@@ -0,0 +1,4 @@
+---
+upgrade:
+  - |
+    Support for Python 3.9 has been dropped.
diff --git a/setup.cfg b/setup.cfg
index 88ddf11a..6eaa51e3 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,15 +3,16 @@ name = python-mistralclient
 summary = Mistral Client Library
 description_file = README.rst
 license = Apache Software License
-python_requires = >=3.9
+python_requires = >=3.10
 classifiers =
     Programming Language :: Python
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
     Environment :: OpenStack
     Intended Audience :: Information Technology
     Intended Audience :: System Administrators
@@ -115,7 +116,6 @@ openstack.workflow_engine.v2 =
     dynamic_action_delete = mistralclient.commands.v2.dynamic_actions:Delete
     dynamic_action_update = mistralclient.commands.v2.dynamic_actions:Update
 
-
 mistralclient.auth =
     # Standard Keystone authentication.
     keystone = mistralclient.auth.keystone:KeystoneAuthHandler