diff --git a/plinth/action_utils.py b/plinth/action_utils.py
index 86042f85a..ffaad50d1 100644
--- a/plinth/action_utils.py
+++ b/plinth/action_utils.py
@@ -207,7 +207,7 @@ def webserver_disable(name, kind='config', apply_changes=True):
     return action_required
 
 
-class WebserverChange(object):
+class WebserverChange:
     """Context to restart/reload Apache after configuration changes."""
 
     def __init__(self):
diff --git a/plinth/modules/config/tests/test_config.py b/plinth/modules/config/tests/test_config.py
index 68115528e..378626a4b 100644
--- a/plinth/modules/config/tests/test_config.py
+++ b/plinth/modules/config/tests/test_config.py
@@ -120,7 +120,7 @@ def test_homepage_mapping_skip_ci():
     assert _home_page_scid2url(uws_scid) is None
 
 
-class Dict2Obj(object):
+class Dict2Obj:
     """Mock object made out of any dict."""
 
     def __init__(self, a_dict):
diff --git a/plinth/modules/users/views.py b/plinth/modules/users/views.py
index 3df2f31a7..ede8e0add 100644
--- a/plinth/modules/users/views.py
+++ b/plinth/modules/users/views.py
@@ -24,7 +24,7 @@ from .forms import (CreateUserForm, FirstBootForm, UserChangePasswordForm,
                     UserUpdateForm)
 
 
-class ContextMixin(object):
+class ContextMixin:
     """Mixin to add 'title' to the template context."""
 
     def get_context_data(self, **kwargs):
diff --git a/plinth/package.py b/plinth/package.py
index bb916e017..9ae39d9a2 100644
--- a/plinth/package.py
+++ b/plinth/package.py
@@ -252,7 +252,7 @@ class PackageException(Exception):
             .format(self.error_string, self.error_details)
 
 
-class Transaction(object):
+class Transaction:
     """Information about an ongoing transaction."""
 
     def __init__(self, module_name, package_names):
diff --git a/plinth/setup.py b/plinth/setup.py
index ae45399e5..1f43fece9 100644
--- a/plinth/setup.py
+++ b/plinth/setup.py
@@ -28,7 +28,7 @@ _is_shutting_down = False
 _force_upgrader = None
 
 
-class Helper(object):
+class Helper:
     """Helper routines for modules to show progress."""
 
     def __init__(self, module_name, module):
diff --git a/plinth/utils.py b/plinth/utils.py
index f6cb6c749..34b1db425 100644
--- a/plinth/utils.py
+++ b/plinth/utils.py
@@ -89,7 +89,7 @@ def is_user_admin(request, cached=False):
     return user_is_admin
 
 
-class YAMLFile(object):
+class YAMLFile:
     """A context management class for updating YAML files"""
 
     def __init__(self, yaml_file):