diff --git a/bookwyrm/activitypub/person.py b/bookwyrm/activitypub/person.py
index 85cf44409..139d6061d 100644
--- a/bookwyrm/activitypub/person.py
+++ b/bookwyrm/activitypub/person.py
@@ -35,7 +35,7 @@ class Person(ActivityObject):
     endpoints: Dict = None
     name: str = None
     summary: str = None
-    icon: Image = field(default_factory=lambda: {})
+    icon: Image = None
     bookwyrmUser: bool = False
     manuallyApprovesFollowers: str = False
     discoverable: str = False
diff --git a/bookwyrm/models/fields.py b/bookwyrm/models/fields.py
index 1e458c815..6c8a130f8 100644
--- a/bookwyrm/models/fields.py
+++ b/bookwyrm/models/fields.py
@@ -477,7 +477,7 @@ class ImageField(ActivitypubFieldMixin, models.ImageField):
         if not url:
             return None
 
-        return activitypub.Document(url=url, name=alt)
+        return activitypub.Image(url=url, name=alt)
 
     def field_from_activity(self, value, allow_external_connections=True):
         image_slug = value