diff --git a/activitypub.py b/activitypub.py
index 6c6372d..8deed50 100644
--- a/activitypub.py
+++ b/activitypub.py
@@ -95,7 +95,7 @@ class MicroblogPubBackend(Backend):
             }
         )
 
-        tasks.cache_attachments(activity.id)
+        tasks.cache_attachments.delay(activity.id)
         if box == Box.INBOX:
             tasks.process_new_activity.delay(activity.id)
 
diff --git a/tasks.py b/tasks.py
index 79d2857..2787a0b 100644
--- a/tasks.py
+++ b/tasks.py
@@ -66,6 +66,7 @@ def cache_attachments(self, iri: str) -> None:
 
         if actor.icon:
             MEDIA_CACHE.cache(actor.icon["url"], Kind.ACTOR_ICON)
+
         if activity.has_type(ap.ActivityType.CREATE):
             for attachment in activity.get_object()._data.get("attachment", []):
                 MEDIA_CACHE.cache(attachment["url"], Kind.ATTACHMENT)