diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index dd45f17..8fe9460 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -10,13 +10,13 @@ repos:
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: 'v0.9.3'
+    rev: 'v0.9.6'
     hooks:
       - id: ruff
         args: ["--fix"]
 
   - repo: https://github.com/psf/black
-    rev: 24.10.0
+    rev: 25.1.0
     hooks:
     - id: black
 
diff --git a/cordex/cmor/utils.py b/cordex/cmor/utils.py
index 963a6b9..5fcfe3c 100644
--- a/cordex/cmor/utils.py
+++ b/cordex/cmor/utils.py
@@ -1,5 +1,4 @@
-"""CORDEX Cmorization utilities.
-"""
+"""CORDEX Cmorization utilities."""
 
 import datetime as dt
 import json
diff --git a/cordex/esgf_access.py b/cordex/esgf_access.py
index 36d0d6b..18ff57c 100644
--- a/cordex/esgf_access.py
+++ b/cordex/esgf_access.py
@@ -1,5 +1,4 @@
-"""this module should help on managing ESGF metadata
-"""
+"""this module should help on managing ESGF metadata"""
 
 import pandas as pd
 
@@ -132,7 +131,7 @@ def get_opendap_urls(attrs, conn=None, agg=False, verbose=False):
 
 def _split_dataset_id(dataset_id):
     """splits a dataset id into list of values."""
-    return dataset_id.split("|")[0].split(".") + [(dataset_id.split("|")[1])]
+    return dataset_id.split("|")[0].split(".") + [dataset_id.split("|")[1]]
 
 
 def _get_columns(columns=None):