diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index efda701..fc7e478 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,7 +19,7 @@ repos:
     hooks:
       - id: reuse
   - repo: https://github.com/codespell-project/codespell
-    rev: v2.4.2
+    rev: v2.4.3
     hooks:
       - id: codespell
   - repo: https://github.com/adamchainz/blacken-docs
@@ -28,7 +28,7 @@ repos:
       - id: blacken-docs
         args: [-l 100]
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.21
+    rev: v0.17.1
     hooks:
       - id: ruff
         args: [--fix, --show-fixes]
@@ -76,7 +76,7 @@ repos:
       - id: trailing-whitespace
         exclude: \.svg$
   - repo: https://github.com/editorconfig-checker/editorconfig-checker.python
-    rev: "3.6.1"
+    rev: "3.11.1"
     hooks:
       - id: editorconfig-checker
         alias: ec
diff --git a/pyproject.toml b/pyproject.toml
index 20222da..ad02f66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "flit_core.buildapi"
 requires = ["flit_core >=3.2,<5"]
 
 [project]
-authors = [{name = "Kevin Meagher"}]
+authors = [{ name = "Kevin Meagher" }]
 classifiers = [
   'Development Status :: 4 - Beta',
   'Intended Audience :: Science/Research',
@@ -26,7 +26,7 @@ classifiers = [
 dependencies = ["numpy>=2", "scipy"]
 dynamic = ["version", "description"]
 keywords = ["python", "science", "astronomy", "astrophysics", "IceCube", "neutrino", "simulation"]
-license = {file = "LICENSES/BSD-2-Clause.txt"}
+license = { file = "LICENSES/BSD-2-Clause.txt" }
 name = "simweights"
 readme = "README.rst"
 requires-python = "~=3.10"
@@ -83,6 +83,7 @@ namespace-packages = ["examples", "contrib", "docs"]
 fixable = ["I", "Q"]
 ignore = [
   "ANN401",  # any-type
+  "CPY001",  # Missing copyright notice at top of file
   "S101",  # assert-used
   "COM812",  # conflicts with ruff formatter
   "PLR0911",  # Too many return statement
diff --git a/src/simweights/_weighter.py b/src/simweights/_weighter.py
index 7e8c843..f5e5c21 100644
--- a/src/simweights/_weighter.py
+++ b/src/simweights/_weighter.py
@@ -263,7 +263,7 @@ def __add__(self: Weighter, other: Weighter | int) -> Weighter:
     def __radd__(self: Weighter, other: Weighter | int) -> Weighter:
         return self + other
 
-    def tostring(self: Weighter, flux: None | object | Callable[[Any], ArrayLike] | ArrayLike = None) -> str:
+    def tostring(self: Weighter, flux: object | Callable[[Any], ArrayLike] | ArrayLike | None = None) -> str:
         """Creates a string with important information about this weighting object.
 
         Generation surface, event map, number of events, and effective area.