diff --git a/CHANGELOG.md b/CHANGELOG.md
index c9d7590..ad7f822 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+## 13.0.0
+
+* Drop support for end-of-life Python 3.10
+* Add support for Python 3.15
+
 ## 12.2.0
 
 * Document `personalisation` on template responses from `get_template`, `get_template_version` and `get_all_templates`. This is an object of placeholder names, for example `{"name": {"required": True}}`.
diff --git a/notifications_python_client/__init__.py b/notifications_python_client/__init__.py
index 2f49e68..23bd391 100644
--- a/notifications_python_client/__init__.py
+++ b/notifications_python_client/__init__.py
@@ -7,7 +7,7 @@
 #
 # -- http://semver.org/
 
-__version__ = "12.2.0"
+__version__ = "13.0.0"
 
 from notifications_python_client.errors import (  # noqa
     REQUEST_ERROR_MESSAGE,
diff --git a/setup.py b/setup.py
index 936f334..7d0ba55 100755
--- a/setup.py
+++ b/setup.py
@@ -48,11 +48,11 @@ def run_tests(self):
         "License :: OSI Approved :: MIT License",
         "Development Status :: 4 - Beta",
         "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: 3.14",
+        "Programming Language :: Python :: 3.15",
     ],
     keywords="gds govuk notify",
     packages=find_packages(include=["notifications_python_client"]),
diff --git a/tox-python-versions b/tox-python-versions
index d7c34fd..fd1115e 100644
--- a/tox-python-versions
+++ b/tox-python-versions
@@ -1,5 +1,5 @@
+3.15
 3.14
 3.13
 3.12
 3.11
-3.10
diff --git a/tox.ini b/tox.ini
index 339fecd..13c403a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-  py{310, 311, 312, 313, 314}
+  py{311, 312, 313, 314, 315}
 
 [testenv]
 allowlist_externals = make