diff --git a/flaschengeist/plugins/auth_ldap/__init__.py b/flaschengeist/plugins/auth_ldap/__init__.py
index ebe84c3..29659bf 100644
--- a/flaschengeist/plugins/auth_ldap/__init__.py
+++ b/flaschengeist/plugins/auth_ldap/__init__.py
@@ -114,7 +114,7 @@ class AuthLDAP(AuthPlugin):
                 }
             )
             if user.display_name:
-                attributes.update( {"displayName": user.display_name})
+                attributes.update({"displayName": user.display_name})
             ldap_conn.add(dn, self.object_classes, attributes)
             self._set_roles(user)
             self.update_user(user)
diff --git a/flaschengeist/plugins/events/event_controller.py b/flaschengeist/plugins/events/event_controller.py
index 46dcb33..432a5a8 100644
--- a/flaschengeist/plugins/events/event_controller.py
+++ b/flaschengeist/plugins/events/event_controller.py
@@ -336,7 +336,16 @@ def respond_invitation(invite: Invitation, accepted=True):
         raise Conflict
 
     if not accepted:
-        EventPlugin.plugin.notify(inviter, _("Invitation rejected"), {"type": NotifyType.INVITATION_REJECTED, "event": job.event_id_, "job": invite.job_id, "invitee": invite.invitee_id})
+        EventPlugin.plugin.notify(
+            inviter,
+            _("Invitation rejected"),
+            {
+                "type": NotifyType.INVITATION_REJECTED,
+                "event": job.event_id_,
+                "job": invite.job_id,
+                "invitee": invite.invitee_id,
+            },
+        )
     else:
         if invite.transferee_id is None:
             assign_job(job, invite.invitee_, 1)
@@ -346,7 +355,16 @@ def respond_invitation(invite: Invitation, accepted=True):
                 raise Conflict
             unassign_job(job, invite.transferee_, service[0], True)
             assign_job(job, invite.invitee_, service[0].value)
-        EventPlugin.plugin.notify(inviter, _("Invitation accepted"), {"type": NotifyType.INVITATION_ACCEPTED, "event": job.event_id_, "job": invite.job_id, "invitee": invite.invitee_id})
+        EventPlugin.plugin.notify(
+            inviter,
+            _("Invitation accepted"),
+            {
+                "type": NotifyType.INVITATION_ACCEPTED,
+                "event": job.event_id_,
+                "job": invite.job_id,
+                "invitee": invite.invitee_id,
+            },
+        )
 
 
 @scheduled