diff --git a/dav_events/signals.py b/dav_events/signals.py
index 918c472..ebc2f4a 100644
--- a/dav_events/signals.py
+++ b/dav_events/signals.py
@@ -1,9 +1,9 @@
 from django.dispatch import Signal
 
-event_created = Signal(providing_args=['event'])
-event_updated = Signal(providing_args=['event', 'diff', 'user'])
-event_status_updated = Signal(providing_args=['event', 'flag'])
-event_registration_closed = Signal(providing_args=['event', 'user'])
+event_created = Signal()
+event_updated = Signal()
+event_status_updated = Signal()
+event_registration_closed = Signal()
 
 
 def signal_handler_for_event_update(sender, **kwargs):
diff --git a/dav_registration/signals.py b/dav_registration/signals.py
index d33bf24..9b41537 100644
--- a/dav_registration/signals.py
+++ b/dav_registration/signals.py
@@ -2,7 +2,7 @@ from django.dispatch import Signal
 
 from . import emails
 
-registration_created = Signal(providing_args=['registration'])
+registration_created = Signal()
 
 
 def send_emails_on_registration(sender, **kwargs):  # pylint: disable=unused-argument