diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2cc9eb2..6307cdc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,6 +16,8 @@ jobs:
       matrix:
         python-version:
           - "pypy3.11"
+          - "3.15t"
+          - "3.15"
           - "3.14t"
           - "3.14"
           - "3.13t"
diff --git a/pyproject.toml b/pyproject.toml
index bdfa940..10c24bb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,6 +28,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Topic :: Text Processing",
@@ -100,7 +101,7 @@ lint.isort.required-imports = [ "from __future__ import annotations" ]
 lint.pydocstyle.convention = "google"
 
 [tool.pyproject-fmt]
-max_supported_python = "3.14"
+max_supported_python = "3.15"
 
 [tool.pytest.ini_options]
 addopts = "--color=yes"
diff --git a/tox.ini b/tox.ini
index 55687a4..a405a7c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ env_list =
     docs
     lint
     mypy
-    py{py3, 314, 313, 312, 311, 310}
+    py{py3, 315, 314, 313, 312, 311, 310}
 
 [testenv]
 extras =