diff --git a/dev-requirements.txt b/dev-requirements.txt
index 4ffce3021d..983fb72bda 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,6 +1,6 @@
-flake8==6.0.0
-pyflakes==3.0.1
-pycodestyle==2.10.0
+flake8==6.1.0
+pyflakes==3.1.0
+pycodestyle==2.11.1
 Sphinx==7.1.2
 sphinx_rtd_theme==1.3.0
 psycopg2==2.9.9
diff --git a/pyramid_oereb/core/config.py b/pyramid_oereb/core/config.py
index e564e1ffed..11f3d70c87 100644
--- a/pyramid_oereb/core/config.py
+++ b/pyramid_oereb/core/config.py
@@ -1577,8 +1577,8 @@ def _get_object_path(current_path, current_object, path, default, required):
 
         current_path.append(k)
 
-        if type(current_object[k]) != dict:
-            raise ConfigurationError('The configuration {} is not an object.'.format(
+        if not isinstance(current_object[k], dict):
+            raise ConfigurationError('The configuration {} is not a dictionary.'.format(
                 '.'.join(current_path)))
 
         return Config._get_object_path(current_path, current_object[k], path[1:], default, required)
diff --git a/tests/contrib.data_sources.standard/test_init.py b/tests/contrib.data_sources.standard/test_init.py
index 5e0e6be6c3..66b076aac9 100644
--- a/tests/contrib.data_sources.standard/test_init.py
+++ b/tests/contrib.data_sources.standard/test_init.py
@@ -1,7 +1,7 @@
 import pytest
 from sqlalchemy.orm import declarative_base
 from sqlalchemy import String, DateTime, Column
-from pyramid_oereb.contrib.data_sources.standard import create_schema_sql, tables, create_tables_sql,\
+from pyramid_oereb.contrib.data_sources.standard import create_schema_sql, tables, create_tables_sql, \
     create_sql
 
 
diff --git a/tests/core/test_hook_methods.py b/tests/core/test_hook_methods.py
index 5dc317c733..0a88ae5f9f 100644
--- a/tests/core/test_hook_methods.py
+++ b/tests/core/test_hook_methods.py
@@ -17,7 +17,7 @@
 from pyramid_oereb.core.records.view_service import LegendEntryRecord
 from pyramid_oereb.core.records.real_estate import RealEstateRecord
 from pyramid_oereb.core.hook_methods import compare, get_symbol, get_symbol_ref, \
-    get_logo_ref, get_qr_code_ref, get_surveying_data_update_date,\
+    get_logo_ref, get_qr_code_ref, get_surveying_data_update_date, \
     plr_sort_within_themes
 from pyramid_oereb.contrib.data_sources.standard.sources.plr import StandardThemeConfigParser
 import pyramid_oereb.contrib.data_sources.standard.hook_methods