diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c74c4f82..2d77438c 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -29,19 +29,19 @@ repos:
     additional_dependencies: [pyyaml]
 
 - repo: https://github.com/asottile/setup-cfg-fmt
-  rev: v2.3.0
+  rev: v2.4.0
   hooks:
   - id: setup-cfg-fmt
-    args: [--include-version-classifiers, --max-py-version=3.11]
+    args: [--include-version-classifiers, --min-py3-version=3.7, --max-py-version=3.11]
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: "v0.0.272"
+  rev: "v0.0.276"
   hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.3.0
+  rev: v1.4.1
   hooks:
   - id: mypy
     files: ^src
diff --git a/src/boost_histogram/_internal/axestuple.py b/src/boost_histogram/_internal/axestuple.py
index b68c4bf2..3247836e 100644
--- a/src/boost_histogram/_internal/axestuple.py
+++ b/src/boost_histogram/_internal/axestuple.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from functools import partial
-from typing import Any, Iterable, TypeVar
+from typing import Any, ClassVar, Iterable, TypeVar
 
 import numpy as np
 
@@ -21,7 +21,7 @@ class MGridOpts(TypedDict):
 class ArrayTuple(tuple):  # type: ignore[type-arg]
     __slots__ = ()
     # This is an exhaustive list as of NumPy 1.19
-    _REDUCTIONS = {"sum", "any", "all", "min", "max", "prod"}
+    _REDUCTIONS = frozenset(("sum", "any", "all", "min", "max", "prod"))
 
     def __getattr__(self, name: str) -> Any:
         if name in self._REDUCTIONS:
@@ -51,7 +51,7 @@ def broadcast(self: A) -> A:
 @set_module("boost_histogram.axis")
 class AxesTuple(tuple):  # type: ignore[type-arg]
     __slots__ = ()
-    _MGRIDOPTS: MGridOpts = {"sparse": True, "indexing": "ij"}
+    _MGRIDOPTS: ClassVar[MGridOpts] = {"sparse": True, "indexing": "ij"}
 
     def __init__(self, __iterable: Iterable[Axis]) -> None:
         for item in self: