diff --git a/simple_locations/base_models.py b/simple_locations/base_models.py
index e9f920d..ac61a0b 100644
--- a/simple_locations/base_models.py
+++ b/simple_locations/base_models.py
@@ -35,20 +35,23 @@ class Meta:
     def __str__(self):
         return _("%(lat)s, %(lon)s") % {"lat": self.latitude, "lon": self.longitude}
 
-Meta = type('Meta', (object,), {'abstract': True})
+
+Meta = type("Meta", (object,), {"abstract": True})
+
 
 def get_area_base(kind_model: AbstractBaseAreaType, point_model: AbstractBasePoint):
     """Return the AbstractBaseArea base class
-        kind_model: Concrete Model for Area Type
-        point_model: Concrete Model for Point
+    kind_model: Concrete Model for Area Type
+    point_model: Concrete Model for Point
     """
     attrs = {
-        'kind': models.ForeignKey(kind_model, blank=True, null=True, on_delete=models.CASCADE),
-        'location': models.ForeignKey(point_model, blank=True, null=True, on_delete=models.CASCADE),
-        '__module__': __name__,
-        'Meta': Meta(),
+        "kind": models.ForeignKey(kind_model, blank=True, null=True, on_delete=models.CASCADE),
+        "location": models.ForeignKey(point_model, blank=True, null=True, on_delete=models.CASCADE),
+        "__module__": __name__,
+        "Meta": Meta(),
     }
-    return type('AbstractBaseArea', (_AbstractBaseArea,), attrs)
+    return type("AbstractBaseArea", (_AbstractBaseArea,), attrs)
+
 
 class _AbstractBaseArea(MPTTModel):
     class Meta:
@@ -110,14 +113,15 @@ def __str__(self) -> str:
 
 def get_projected_area_base(area_model: _AbstractBaseArea):
     """Return the AbstractBaseProjectedArea base class
-        area_model: Concrete Model for Area
+    area_model: Concrete Model for Area
     """
     attrs = {
-        'area': models.OneToOneField(area_model, primary_key=True, on_delete=models.CASCADE),
-        '__module__': __name__,
-        'Meta': Meta(),
+        "area": models.OneToOneField(area_model, primary_key=True, on_delete=models.CASCADE),
+        "__module__": __name__,
+        "Meta": Meta(),
     }
-    return type('AbstractBaseProjectedArea', (_AbstractBaseProjectedArea,), attrs)
+    return type("AbstractBaseProjectedArea", (_AbstractBaseProjectedArea,), attrs)
+
 
 class _AbstractBaseProjectedArea(models.Model):
     """
@@ -132,16 +136,18 @@ class Meta:
 
     geom = MultiPolygonField(null=True, blank=True, srid=3857)
 
+
 def get_border_base(area_model: _AbstractBaseArea):
     """Return the AbstractBaseProjectedArea base class
-        area_model: Concrete Model for Area
+    area_model: Concrete Model for Area
     """
     attrs = {
-        'area': models.ManyToManyField(area_model),
-        '__module__': __name__,
-        'Meta': Meta(),
+        "area": models.ManyToManyField(area_model),
+        "__module__": __name__,
+        "Meta": Meta(),
     }
-    return type('AbstractBaseBorder', (_AbstractBaseBorder,), attrs)
+    return type("AbstractBaseBorder", (_AbstractBaseBorder,), attrs)
+
 
 class _AbstractBaseBorder(models.Model):
     """
diff --git a/simple_locations/models.py b/simple_locations/models.py
index e649d9f..bb7a137 100644
--- a/simple_locations/models.py
+++ b/simple_locations/models.py
@@ -81,15 +81,17 @@ class Point(base_models.AbstractBasePoint):
     class Meta(base_models.AbstractBasePoint.Meta):
         app_label = "simple_locations"
 
+
 class AreaType(base_models.AbstractBaseAreaType):
     class Meta(base_models.AbstractBaseAreaType.Meta):
         app_label = "simple_locations"
 
-class Area(base_models.get_area_base(AreaType, Point)):
 
+class Area(base_models.get_area_base(AreaType, Point)):
     class Meta(base_models._AbstractBaseArea.Meta):
         app_label = "simple_locations"
 
+
 class ProjectedArea(base_models.get_projected_area_base(Area)):
     pass
 
diff --git a/sl_tests/models.py b/sl_tests/models.py
index 8a44de5..417fccb 100644
--- a/sl_tests/models.py
+++ b/sl_tests/models.py
@@ -6,4 +6,4 @@ class WgsPoint(models.Model):
 
 
 class MercatorPoint(models.Model):
-    position = models.PointField(srid=3857)
\ No newline at end of file
+    position = models.PointField(srid=3857)