diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e302cb43..9a995bd5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -24,11 +24,11 @@ repos:
     - id: end-of-file-fixer
     - id: trailing-whitespace
   - repo: https://github.com/tox-dev/pyproject-fmt
-    rev: v2.11.1
+    rev: v2.12.1
     hooks:
     - id: pyproject-fmt
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.24.1
+    rev: v0.25
     hooks:
     - id: validate-pyproject
   - repo: https://github.com/sphinx-contrib/sphinx-lint
@@ -44,7 +44,7 @@ repos:
       entry: isort --profile=black
       name: isort (python)
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: 25.12.0
+    rev: 26.1.0
     hooks:
     - id: black
   - repo: https://github.com/tonybaloney/perflint
diff --git a/docs/conf.py b/docs/conf.py
index 504f0942..14cb00bb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,6 @@
 import os
 import re
 
-
 # Set canonical URL for the sitemap
 html_baseurl = "https://python4data.science/de/latest/"
 
@@ -33,7 +32,6 @@
 import os
 import re
 
-
 project = "Python für Data Science"
 author = "Veit Schiele"
 copyright = f"2019–2025, {author}"
diff --git a/docs/data-processing/apis/grpc/accounts_pb2.py b/docs/data-processing/apis/grpc/accounts_pb2.py
index fbe1589d..bf7c2ec9 100644
--- a/docs/data-processing/apis/grpc/accounts_pb2.py
+++ b/docs/data-processing/apis/grpc/accounts_pb2.py
@@ -6,12 +6,12 @@
 # Generated by the protocol buffer compiler.  DO NOT EDIT!
 # source: accounts.proto
 """Generated protocol buffer code."""
+
 from google.protobuf import descriptor as _descriptor
 from google.protobuf import message as _message
 from google.protobuf import reflection as _reflection
 from google.protobuf import symbol_database as _symbol_database
 
-
 # @@protoc_insertion_point(imports)
 
 _sym_db = _symbol_database.Default()
diff --git a/docs/data-processing/apis/grpc/accounts_pb2_grpc.py b/docs/data-processing/apis/grpc/accounts_pb2_grpc.py
index c6c2f83d..b3787a52 100644
--- a/docs/data-processing/apis/grpc/accounts_pb2_grpc.py
+++ b/docs/data-processing/apis/grpc/accounts_pb2_grpc.py
@@ -4,6 +4,7 @@
 
 # Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
 """Client and server classes corresponding to protobuf-defined services."""
+
 import accounts_pb2 as accounts__pb2
 import grpc
 
diff --git a/docs/productive/git/advanced/exceltocsv.py b/docs/productive/git/advanced/exceltocsv.py
index a6235830..1972f47b 100644
--- a/docs/productive/git/advanced/exceltocsv.py
+++ b/docs/productive/git/advanced/exceltocsv.py
@@ -8,7 +8,6 @@
 
 import pandas as pd
 
-
 for sheet_name in pd.ExcelFile(sys.argv[1]).sheet_names:
     output = StringIO()
     print("Sheet: %s" % sheet_name)
diff --git a/fastapi/main.py b/fastapi/main.py
index b2e7e624..7aa41f3d 100644
--- a/fastapi/main.py
+++ b/fastapi/main.py
@@ -8,7 +8,6 @@
 
 from fastapi import FastAPI
 
-
 app = FastAPI()