diff --git a/src/drc/api/serializers/enkelvoudig_informatieobject.py b/src/drc/api/serializers/enkelvoudig_informatieobject.py
index 689e88fd..0d74ac8f 100644
--- a/src/drc/api/serializers/enkelvoudig_informatieobject.py
+++ b/src/drc/api/serializers/enkelvoudig_informatieobject.py
@@ -238,7 +238,10 @@ def _create_bestandsdeel(self, full_size, canonical):
         for i in range(parts):
             chunk_size = min(settings.CHUNK_SIZE, full_size)
             BestandsDeel.objects.create(
-                informatieobject=canonical, omvang=chunk_size, volgnummer=i + 1, lock=canonical.lock
+                informatieobject=canonical,
+                omvang=chunk_size,
+                volgnummer=i + 1,
+                lock=canonical.lock,
             )
             full_size -= chunk_size