diff --git a/pyproject.toml b/pyproject.toml
index b902c3061..a8c53c1f1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
+  "Programming Language :: Python :: 3.14",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
   "Topic :: Software Development :: Libraries :: Python Modules",
@@ -82,6 +83,9 @@ lint.fixable = [
 ]
 lint.unfixable = [ "RUF001" ]
 
+[tool.pyproject-fmt]
+max_supported_python = "3.14"
+
 [tool.pytest.ini_options]
 addopts = '-m "not acceptance"'
 python_files = [ "*test_*.py" ]
diff --git a/tox.ini b/tox.ini
index 2f089b6a3..b3bd055eb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{39,310,311,312,313}
+envlist = py{39,310,311,312,313,314}
 skip_missing_interpreters = true
 isolated_build = true