diff --git a/pyproject.toml b/pyproject.toml
index 6f9a8a1..3b85d5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -283,6 +283,7 @@ pep621_dev_dependency_groups = [
 [tool.pyproject-fmt]
 indent = 4
 keep_full_version = true
+max_supported_python = "3.12"
 
 [tool.pytest.ini_options]