diff --git a/compilacao/views.py b/compilacao/views.py
index d572c30b0..c705a36e0 100644
--- a/compilacao/views.py
+++ b/compilacao/views.py
@@ -138,7 +138,7 @@ def choice_models_in_extenal_views():
     return result
 
 
-class CompMixin(object):
+class CompMixin:
 
     @property
     def title(self):
@@ -1002,7 +1002,7 @@ class DispositivoEditView(TextEditView):
         return result
 
 
-class ActionsEditMixin(object):
+class ActionsEditMixin:
 
     def render_to_json_response(self, context, **response_kwargs):
 
@@ -1346,7 +1346,7 @@ class ActionsEditView(ActionsEditMixin, TemplateView):
         return self.render_to_json_response(context, **response_kwargs)
 
 
-class DispositivoSuccessUrlMixin(object):
+class DispositivoSuccessUrlMixin:
 
     def get_success_url(self):
         return reverse_lazy(
diff --git a/crispy_layout_mixin.py b/crispy_layout_mixin.py
index 0ece800e0..46dadf7a7 100644
--- a/crispy_layout_mixin.py
+++ b/crispy_layout_mixin.py
@@ -65,7 +65,7 @@ def get_field_display(obj, fieldname):
     return verbose_name, display
 
 
-class CrispyLayoutFormMixin(object):
+class CrispyLayoutFormMixin:
 
     def get_layout(self):
         filename = join(
diff --git a/crud.py b/crud.py
index 41548d106..646c19d77 100644
--- a/crud.py
+++ b/crud.py
@@ -170,7 +170,7 @@ class CrudDeleteMixin(FormMessagesMixin):
         return self.list_url
 
 
-class Crud(object):
+class Crud:
 
     def __init__(self, model, help_path,
                  base_mixin=BaseCrudMixin,
diff --git a/legacy/migration.py b/legacy/migration.py
index 6ccd362cf..1da5ddf67 100644
--- a/legacy/migration.py
+++ b/legacy/migration.py
@@ -120,7 +120,7 @@ def exec_sql(sql, db='default'):
 
 
 def iter_sql_records(sql, db):
-    class Record(object):
+    class Record:
         pass
     cursor = exec_sql(sql, db)
     fieldnames = [name[0] for name in cursor.description]
@@ -149,7 +149,7 @@ def make_stub(model, id):
     return new
 
 
-class DataMigrator(object):
+class DataMigrator:
 
     def __init__(self):
         self.field_renames, self.model_renames = get_renames()
diff --git a/legacy/router.py b/legacy/router.py
index 1e3c92135..68b235059 100644
--- a/legacy/router.py
+++ b/legacy/router.py
@@ -1,4 +1,4 @@
-class LegacyRouter(object):
+class LegacyRouter:
 
     def db_for_read(self, model, **hints):
         if model._meta.app_label == 'legacy':
diff --git a/legacy/scripts/scrap_original_forms.py b/legacy/scripts/scrap_original_forms.py
index d9fab3bf5..3527875a5 100644
--- a/legacy/scripts/scrap_original_forms.py
+++ b/legacy/scripts/scrap_original_forms.py
@@ -240,7 +240,7 @@ def extract_fieldsets_for_current(model):
         raise Exception(e, model)
 
 
-class Under(object):
+class Under:
 
     def __init__(self, arg):
         self.arg = arg
diff --git a/sessao/views.py b/sessao/views.py
index 01187c21d..93588e01d 100644
--- a/sessao/views.py
+++ b/sessao/views.py
@@ -39,7 +39,7 @@ tipo_expediente_crud = Crud(TipoExpediente, 'tipo_expediente')
 registro_votacao_crud = Crud(RegistroVotacao, '')
 
 
-class PresencaMixin(object):
+class PresencaMixin:
 
     def get_parlamentares(self):
         self.object = self.get_object()