diff --git a/apps/perms/models/base.py b/apps/perms/models/base.py
index b36d009b3..878d9d739 100644
--- a/apps/perms/models/base.py
+++ b/apps/perms/models/base.py
@@ -29,7 +29,7 @@ class BasePermissionQuerySet(models.QuerySet):
         return self.filter(is_active=False)
 
     def invalid(self):
-        now = timezone.now
+        now = timezone.now()
         q = (
             Q(is_active=False) |
             Q(date_start__gt=now) |