diff --git a/src/django_peeringdb/fields.py b/src/django_peeringdb/fields.py
index 23a6e81..e542330 100644
--- a/src/django_peeringdb/fields.py
+++ b/src/django_peeringdb/fields.py
@@ -5,7 +5,6 @@
 
 
 class MultipleChoiceField(models.CharField):
-
     """
     Field that can take a set of string values
     and store them in a charfield using a delimiter
diff --git a/src/django_peeringdb/migrations/0034_fix_voltage.py b/src/django_peeringdb/migrations/0034_fix_voltage.py
index 905daf9..fd1e3fc 100644
--- a/src/django_peeringdb/migrations/0034_fix_voltage.py
+++ b/src/django_peeringdb/migrations/0034_fix_voltage.py
@@ -22,9 +22,9 @@ def forward(apps, schema_editor):
     try:
         # overide from_db_value method
         # because this method calls "clean_choices" resulting in a validation error when retrieving all facilites.
-        Facility._meta.get_field(
-            "available_voltage_services"
-        ).from_db_value = _from_db_value
+        Facility._meta.get_field("available_voltage_services").from_db_value = (
+            _from_db_value
+        )
         facilities = Facility.handleref.all()
         for facility in facilities:
             voltage = facility.available_voltage_services
@@ -42,9 +42,9 @@ def forward(apps, schema_editor):
                 print(f"Removed {removed} from {facility}")
                 facility.save()
     finally:
-        Facility._meta.get_field(
-            "available_voltage_services"
-        ).from_db_value = from_db_value
+        Facility._meta.get_field("available_voltage_services").from_db_value = (
+            from_db_value
+        )
         updated_field.auto_now = updated_field_auto_now