diff --git a/sapl/legacy/migration.py b/sapl/legacy/migration.py
index 58d75994a..176044f52 100644
--- a/sapl/legacy/migration.py
+++ b/sapl/legacy/migration.py
@@ -4,9 +4,8 @@ from functools import lru_cache
 from subprocess import PIPE, call
 
 import pkg_resources
-import yaml
-
 import reversion
+import yaml
 from django.apps import apps
 from django.apps.config import AppConfig
 from django.contrib.auth import get_user_model
@@ -16,6 +15,7 @@ from django.core.exceptions import ObjectDoesNotExist
 from django.db import connections, transaction
 from django.db.models import Count, Max
 from django.db.models.base import ModelBase
+
 from sapl.base.models import AppConfig as AppConf
 from sapl.base.models import (Autor, CasaLegislativa, ProblemaMigracao,
                               TipoAutor)
diff --git a/sapl/materia/forms.py b/sapl/materia/forms.py
index 10f2d6e23..0f9d56ee2 100644
--- a/sapl/materia/forms.py
+++ b/sapl/materia/forms.py
@@ -1,6 +1,7 @@
 
 import os
 
+import django_filters
 from crispy_forms.bootstrap import Alert, FormActions, InlineRadios
 from crispy_forms.helper import FormHelper
 from crispy_forms.layout import (HTML, Button, Column, Div, Field, Fieldset,
@@ -21,8 +22,8 @@ from django.utils.encoding import force_text
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
-import django_filters
 
+import sapl
 from sapl.base.models import Autor, TipoAutor
 from sapl.comissoes.models import Comissao
 from sapl.compilacao.models import (STATUS_TA_IMMUTABLE_PUBLIC,
@@ -41,7 +42,6 @@ from sapl.utils import (RANGE_ANOS, YES_NO_CHOICES,
                         MateriaPesquisaOrderingFilter, RangeWidgetOverride,
                         autor_label, autor_modal, models_with_gr_for_model,
                         qs_override_django_filter)
-import sapl
 
 from .models import (AcompanhamentoMateria, Anexada, Autoria, DespachoInicial,
                      DocumentoAcessorio, Numeracao, Proposicao, Relatoria,