diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5d97abbc..5ebd5c90 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,7 +13,7 @@ ci:
 
 repos: 
 - repo: https://github.com/psf/black-pre-commit-mirror 
-  rev: 25.12.0 
+  rev: 26.1.0 
   hooks:
   - id: black
     args: [
diff --git a/examples/setup_example_database.py b/examples/setup_example_database.py
index 2af86f65..a4d0220f 100644
--- a/examples/setup_example_database.py
+++ b/examples/setup_example_database.py
@@ -5,7 +5,6 @@
 from psycopg2.extensions import ISOLATION_LEVEL_AUTOCOMMIT
 import trackintel as ti
 
-
 # This script will remove the following table from your database!
 # It will then, however, repopulate it with new data.
 database_name = "trackintel-tests"
diff --git a/tests/geogr/test_distances.py b/tests/geogr/test_distances.py
index 60271c74..ecf55508 100644
--- a/tests/geogr/test_distances.py
+++ b/tests/geogr/test_distances.py
@@ -38,8 +38,7 @@ def gdf_lineStrings():
 @pytest.fixture
 def single_linestring():
     """Construct LineString that has ~1024 m in QGIS."""
-    return wkt.loads(
-        """LineString(13.47671401745228259
+    return wkt.loads("""LineString(13.47671401745228259
     48.57364142178052901, 13.47510901146785933
     48.5734004715611789, 13.47343656825720082
     48.57335585102421049, 13.47172366271079369
@@ -49,8 +48,7 @@ def single_linestring():
     48.57348971251707326, 13.46473716607271243
     48.57319521676494389, 13.46319959731452798
     48.57253482611510975, 13.46319959731452798
-    48.57253482611510975)"""
-    )
+    48.57253482611510975)""")
 
 
 @pytest.fixture
diff --git a/trackintel/model/util.py b/trackintel/model/util.py
index b59643a2..37d77643 100644
--- a/trackintel/model/util.py
+++ b/trackintel/model/util.py
@@ -167,9 +167,7 @@ def decorator(decorated):
 _shared_docs = {}
 
 # in _shared_docs as all write_postgis_xyz functions use this docstring
-_shared_docs[
-    "write_postgis"
-] = """
+_shared_docs["write_postgis"] = """
 Stores {long} to PostGIS. Usually, this is directly called on a {long}
 DataFrame (see example below).
 
@@ -210,9 +208,7 @@ def decorator(decorated):
 >>> ti.io.write_{long}_postgis({short}, conn_string, table_name)
 """
 
-_shared_docs[
-    "write_csv"
-] = """
+_shared_docs["write_csv"] = """
 Write {long} to csv file.
 
 Wraps the pandas to_csv function.
diff --git a/trackintel/visualization/__init__.py b/trackintel/visualization/__init__.py
index 5c520cfe..bb1d9e4e 100644
--- a/trackintel/visualization/__init__.py
+++ b/trackintel/visualization/__init__.py
@@ -2,7 +2,6 @@
 from .plotting import plot_osm_streets
 from .plotting import plot_modal_split
 
-
 __all__ = [
     "plot",
     "plot_osm_streets",