diff --git a/combo/apps/notifications/urls.py b/combo/apps/notifications/urls.py
index 54b9eef3..1a5a6542 100644
--- a/combo/apps/notifications/urls.py
+++ b/combo/apps/notifications/urls.py
@@ -21,9 +21,9 @@ from .api_views import add, ack, forget, count
 urlpatterns = [
     url('^api/notification/add/$', add,
         name='api-notification-add'),
-    url(r'^api/notification/ack/(?P<notification_id>[\w-]+)/$', ack,
+    url(r'^api/notification/ack/(?P<notification_id>[\w:_-]+)/$', ack,
         name='api-notification-ack'),
-    url(r'^api/notification/forget/(?P<notification_id>[\w-]+)/$', forget,
+    url(r'^api/notification/forget/(?P<notification_id>[\w:_-]+)/$', forget,
         name='api-notification-forget'),
     url('^api/notification/count/$', count,
         name='api-notification-count'),