diff --git a/releasenotes/notes/remove-py39-fca5d9e7d2e135cf.yaml b/releasenotes/notes/remove-py39-fca5d9e7d2e135cf.yaml
new file mode 100644
index 000000000..eaf3014b9
--- /dev/null
+++ b/releasenotes/notes/remove-py39-fca5d9e7d2e135cf.yaml
@@ -0,0 +1,5 @@
+---
+upgrade:
+ - |
+ Support for Python 3.9 has been removed. Now Python 3.10 is the minimum
+ version supported.
diff --git a/setup.cfg b/setup.cfg
index d2b1b373f..bb4bb3b99 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -7,7 +7,7 @@ author_email = openstack-discuss@lists.openstack.org
 home_page = https://docs.openstack.org/ironic-python-agent/
 summary = Ironic Python Agent Ramdisk
 license = Apache-2
-python_requires =>=3.9
+python_requires =>=3.10
 classifier =
 Environment :: OpenStack
 Intended Audience :: System Administrators
@@ -18,7 +18,6 @@ classifier =
 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
</div><div class="naked_ctrl">
<form action="/index.cgi/speech" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="https://opendev.org/openstack/ironic-python-agent/commit/26b7d6f3005229fb66e5bffc3960ff2a10d4aa14.diff">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="https://opendev.org/openstack/ironic-python-agent/commit/26b7d6f3005229fb66e5bffc3960ff2a10d4aa14.diff" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech" selected="selected">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>