diff --git a/vendor/regidesk/regidesk/models.py b/vendor/regidesk/regidesk/models.py
index 0bb590f6e6d4a67d21490c2db3ab866e2f41f679..b8417ef2ef50ad9a0732184a101c0bae60fee402 100644
--- a/vendor/regidesk/regidesk/models.py
+++ b/vendor/regidesk/regidesk/models.py
@@ -12,7 +12,7 @@ from django.db.models import Q, F
 from django.db.models import Case, When, Value
 from django.db.models import Count
 from django.db.models.signals import post_save
-from django.contrib.auth.models import User
+from django.contrib.auth import get_user_model
 import pyqrcode
 
 from symposion import constants
@@ -20,6 +20,8 @@ from symposion.text_parser import parse
 from registrasion.models import commerce
 from registrasion.util import generate_access_code as generate_code
 
+User = get_user_model()
+
 
 class BoardingPassTemplate(models.Model):
 
@@ -60,7 +62,7 @@ class BoardingPass(models.Model):
 
 class CheckIn(models.Model):
 
-    user = models.OneToOneField(User)
+    user = models.OneToOneField(User, on_delete=models.CASCADE)
     boardingpass = models.OneToOneField(BoardingPass, null=True,
                                         blank=True, on_delete=models.SET_NULL)
     seen = models.DateTimeField(null=True,blank=True)