diff --git a/iiif_prezi3/helpers/__init__.py b/iiif_prezi3/helpers/__init__.py
index 3a57cf5..e7685fd 100644
--- a/iiif_prezi3/helpers/__init__.py
+++ b/iiif_prezi3/helpers/__init__.py
@@ -3,7 +3,7 @@
 from .add_label import AddLabel  # noqa: F401
 from .add_metadata import AddMetadata  # noqa: F401
 from .add_range import AddRange  # noqa: F401
-from .add_rendering import AddRendering # noqa: F401
+from .add_rendering import AddRendering  # noqa: F401
 from .add_service import AddService  # noqa: F401
 from .add_thumbnail import AddThumbnail  # noqa: F401
 from .annotation_helpers import AnnotationHelpers  # noqa: F401
diff --git a/iiif_prezi3/helpers/add_rendering.py b/iiif_prezi3/helpers/add_rendering.py
index 8ed879c..19f0bed 100644
--- a/iiif_prezi3/helpers/add_rendering.py
+++ b/iiif_prezi3/helpers/add_rendering.py
@@ -1,6 +1,7 @@
 from ..loader import monkeypatch_schema
-from ..skeleton import (ExternalItem, AnnotationPage, AccompanyingCanvas, Annotation, AnnotationCollection, Canvas,
-                        PlaceholderCanvas, Range, ResourceItem, Collection, Manifest)
+from ..skeleton import (AccompanyingCanvas, Annotation, AnnotationCollection,
+                        AnnotationPage, Canvas, Collection, ExternalItem,
+                        Manifest, PlaceholderCanvas, Range, ResourceItem)
 
 
 class AddRendering: