diff --git a/home/models.py b/home/models.py
index 86c0a94..9d9947c 100644
--- a/home/models.py
+++ b/home/models.py
@@ -112,7 +112,7 @@ class EventPage(Page):
         related_name="hosted_events",
         help_text="Select users who will be listed as hosts of this event.",
     )
-    signed_up_users = models.ManyToManyField(
+    signed_up_users = ParentalManyToManyField(
         User,
         related_name="signed_up_events",
         blank=True,