diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ca13964..528885c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -25,6 +25,7 @@ jobs:
         - '3.12'
         - '3.13'
         - '3.14'
+        - '3.15'
 
     steps:
     - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 3c434fe..68f546b 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,11 @@
 Changelog
 =========
 
+Unreleased
+----------
+
+* Support Python 3.15.
+
 * Switch package build backend from setuptools to `uv_build <https://docs.astral.sh/uv/concepts/build-backend/>`__.
   This makes builds with uv about nine times faster, since uv runs the backend natively, without creating a build environment or spawning a Python process.
   Additionally, source distributions no longer include test files, which setuptools previously included incompletely, missing the files needed to actually run them.
diff --git a/README.rst b/README.rst
index b9890eb..5f6e510 100644
--- a/README.rst
+++ b/README.rst
@@ -111,7 +111,7 @@ Install with:
 
     python -m pip install pytest-randomly
 
-Python 3.10 to 3.14 supported.
+Python 3.10 to 3.15 supported.
 
 Usage
 =====
diff --git a/pyproject.toml b/pyproject.toml
index 6e27f98..aa7cd6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Typing :: Typed",
 ]
 dependencies = [
@@ -92,7 +93,7 @@ lint.extend-safe-fixes = [
 lint.isort.required-imports = [ "from __future__ import annotations" ]
 
 [tool.pyproject-fmt]
-max_supported_python = "3.14"
+max_supported_python = "3.15"
 
 [tool.mypy]
 mypy_path = "src/"
diff --git a/tox.ini b/tox.ini
index 1a8169e..980dcfd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 requires =
     tox>=4.2
 env_list =
-    py{314, 313, 312, 311, 310}
+    py{315, 314, 313, 312, 311, 310}
 
 [testenv]
 runner = uv-venv-lock-runner