diff --git a/radicale/app/put.py b/radicale/app/put.py
index 69537799..650ce42e 100644
--- a/radicale/app/put.py
+++ b/radicale/app/put.py
@@ -196,7 +196,9 @@ class ApplicationPutMixin:
                         path, prepared_items, props).etag
                     for item in prepared_items:
                         hook_notification_item = HookNotificationItem(
-                            HookNotificationItemTypes.UPSERT, item.serialize())
+                            HookNotificationItemTypes.UPSERT,
+                            item.serialize()
+                        )
                         self._hook.notify(hook_notification_item)
                 except ValueError as e:
                     logger.warning(
@@ -214,7 +216,9 @@ class ApplicationPutMixin:
                 try:
                     etag = parent_item.upload(href, prepared_item).etag
                     hook_notification_item = HookNotificationItem(
-                        HookNotificationItemTypes.UPSERT, prepared_item.serialize())
+                        HookNotificationItemTypes.UPSERT,
+                        prepared_item.serialize()
+                    )
                     self._hook.notify(hook_notification_item)
                 except ValueError as e:
                     logger.warning(
diff --git a/radicale/hook/rabbitmq/__init__.py b/radicale/hook/rabbitmq/__init__.py
index 4953a33e..b3a19712 100644
--- a/radicale/hook/rabbitmq/__init__.py
+++ b/radicale/hook/rabbitmq/__init__.py
@@ -28,4 +28,5 @@ class Hook(hook.BaseHook):
             self.channel.basic_publish(
                 exchange='',
                 routing_key=self.topic,
-                body=notification_item.to_json().encode(encoding=self.encoding))
+                body=notification_item.to_json().encode(encoding=self.encoding)
+            )