diff --git a/archivebox/index/sql.py b/archivebox/index/sql.py
index a168e589..0ad68de0 100644
--- a/archivebox/index/sql.py
+++ b/archivebox/index/sql.py
@@ -53,7 +53,7 @@ def write_sql_link_details(link: Link, out_dir: str=OUTPUT_DIR) -> None:
     from django.db import transaction
 
     with transaction.atomic():
-        snap = Snapshot.objects.get(url=link['url'], timestamp=link['timestamp'])
+        snap = Snapshot.objects.get(url=link.url, timestamp=link.timestamp)
         snap.title = link.title
         snap.tags = link.tags
         snap.save()