diff --git a/activities/models/post.py b/activities/models/post.py
index 25afdda..c3de16f 100644
--- a/activities/models/post.py
+++ b/activities/models/post.py
@@ -70,7 +70,7 @@ class Post(StatorModel):
     # The author (attributedTo) of the post
     author = models.ForeignKey(
         "users.Identity",
-        on_delete=models.PROTECT,
+        on_delete=models.CASCADE,
         related_name="posts",
     )