diff --git a/src/plone/restapi/deserializer/publication_dates.py b/src/plone/restapi/deserializer/publication_dates.py
index b64d5c4151..25b329e949 100644
--- a/src/plone/restapi/deserializer/publication_dates.py
+++ b/src/plone/restapi/deserializer/publication_dates.py
@@ -36,7 +36,9 @@ def set(self, value):
             return super().set(value)
         if value is not None:
             if value.tzinfo is None:
-                value = DateTime(value.year, value.month, value.day, value.hour, value.minute)
+                value = DateTime(
+                    value.year, value.month, value.day, value.hour, value.minute
+                )
             else:
                 value = DateTime(value)
         setattr(self.context, self.name, value)
diff --git a/src/plone/restapi/serializer/dxfields.py b/src/plone/restapi/serializer/dxfields.py
index d6db342260..94e1546e1e 100644
--- a/src/plone/restapi/serializer/dxfields.py
+++ b/src/plone/restapi/serializer/dxfields.py
@@ -1,5 +1,4 @@
 from AccessControl import getSecurityManager
-from DateTime import DateTime
 from plone.app.contenttypes.interfaces import ILink
 from plone.app.contenttypes.utils import replace_link_variables_by_paths
 from plone.app.dexterity.behaviors.metadata import IPublication