diff --git a/mastodon/input.py b/mastodon/input.py
--- a/mastodon/input.py
+++ b/mastodon/input.py
@@ -1,4 +1,3 @@
-import asyncio
 import json
 import re
 from dataclasses import dataclass, field
@@ -155,7 +154,7 @@
         blobs: list[Blob] = []
         for media in status.get("media_attachments", []):
             self.log.info("Downloading '%s'...", media["url"])
-            blob = download_blob(media["url"], media.get("alt"), client=self.http)
+            blob = download_blob(media["url"], media.get("description"), client=self.http)
             if not blob.is_ok():
                 self.log.error(
                     "Skipping '%s': failed to download attachment. %s",
@@ -268,5 +267,5 @@ except TimeoutError as e:
                 self.log.warning("Connection timeout: '%s'", e)
             except Exception as e:
                 self.log.error("Unexpected error: '%s'", e, exc_info=True)
-            
+
             self.log.info("Reconnecting to '%s'...", self.streaming_url)