diff --git a/pantalaimon/client.py b/pantalaimon/client.py
index f20b792..e705fda 100644
--- a/pantalaimon/client.py
+++ b/pantalaimon/client.py
@@ -830,13 +830,10 @@ class PanClient(AsyncClient):
             if isinstance(decrypted_event, RoomEncryptedMedia):
                 decrypted_event.source["content"]["url"] = decrypted_event.url
 
-                if (
-                    "info" in decrypted_event.source
-                    and "thumbnail_file" in decrypted_event.source["info"]
-                ):
+                if decrypted_event.thumbnail_url:
                     decrypted_event.source["content"]["info"][
                         "thumbnail_url"
-                    ] = decrypted_event.source["thumbnail_file"].get("url")
+                    ] = decrypted_event.thumbnail_url
 
             event_dict.update(decrypted_event.source)
             event_dict["decrypted"] = True