diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9d8c075..4aae679 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@ exclude: '^docs/conf.py'
 
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
-  rev: v4.4.0
+  rev: v6.0.0
   hooks:
   - id: trailing-whitespace
   - id: check-added-large-files
@@ -18,22 +18,22 @@ repos:
     args: ['--fix=auto']  # replace 'auto' with 'lf' to enforce Linux/Mac line endings or 'crlf' for Windows
 
 - repo: https://github.com/PyCQA/docformatter
-  rev: v1.7.5
+  rev: v1.7.8
   hooks:
     - id: docformatter
       additional_dependencies: [tomli]
       args: [--in-place, --wrap-descriptions=120, --wrap-summaries=120]
       # --config, ./pyproject.toml
 
-- repo: https://github.com/psf/black
-  rev: 23.9.1
+- repo: https://github.com/psf/black-pre-commit-mirror
+  rev: 26.3.1
   hooks:
   - id: black
     language_version: python3
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
   # Ruff version.
-  rev: v0.0.287
+  rev: v0.15.12
   hooks:
     - id: ruff
       args: [--fix, --exit-non-zero-on-fix]
diff --git a/setup.py b/setup.py
index 6829222..e1f22c6 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,10 @@
-"""Setup file for biocborn. Use setup.cfg to configure your project.
+"""Setup file for biocborn.
 
-This file was generated with PyScaffold 4.5.
-PyScaffold helps you to put up the scaffold of your new Python project.
-Learn more under: https://pyscaffold.org/
+Use setup.cfg to configure your project. This file was generated with PyScaffold 4.5. PyScaffold helps you to put up the
+scaffold of your new Python project. Learn more under:
+https://pyscaffold.org/
 """
+
 from setuptools import setup
 
 if __name__ == "__main__":
diff --git a/src/biocborn/utils.py b/src/biocborn/utils.py
index bf9e4a2..61929ec 100644
--- a/src/biocborn/utils.py
+++ b/src/biocborn/utils.py
@@ -29,7 +29,6 @@ def factorize(x: Sequence) -> FactorizedArray:
     Returns:
         FactorizedArray: A factorized tuple.
     """
-
     if not isinstance(x, list):
         raise TypeError("x is not a list")