diff --git a/pybind11/__init__.py b/pybind11/__init__.py
index 99408ea2cf..e9d033c4b4 100644
--- a/pybind11/__init__.py
+++ b/pybind11/__init__.py
@@ -2,7 +2,7 @@
 
 import sys
 
-if sys.version_info < (3, 8):
+if sys.version_info < (3, 8):  # noqa: UP036
     msg = "pybind11 does not support Python < 3.8. v2.13 was the last release supporting Python 3.7."
     raise ImportError(msg)
 
diff --git a/pybind11/setup_helpers.py b/pybind11/setup_helpers.py
index ced506f8c2..f24291818c 100644
--- a/pybind11/setup_helpers.py
+++ b/pybind11/setup_helpers.py
@@ -249,7 +249,7 @@ def has_flag(compiler: Any, flag: str) -> bool:
 cpp_flag_cache = None
 
 
-@lru_cache()
+@lru_cache
 def auto_cpp_level(compiler: Any) -> str | int:
     """
     Return the max supported C++ std level (17, 14, or 11). Returns latest on Windows.
diff --git a/pyproject.toml b/pyproject.toml
index 64f70ae8a1..c5e2651d6a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,7 +45,7 @@ messages_control.disable = [
 ]
 
 [tool.ruff]
-target-version = "py37"
+target-version = "py38"
 src = ["src"]
 
 [tool.ruff.lint]