diff --git a/archivebox/core/models.py b/archivebox/core/models.py
index 655a01c5..bdffddc5 100644
--- a/archivebox/core/models.py
+++ b/archivebox/core/models.py
@@ -213,7 +213,6 @@ class Snapshot(models.Model):
             return self.history['title'][-1].output.strip()
         return None
 
-    
     @cached_property
     def domain(self) -> str:
         from ..util import domain
diff --git a/archivebox/main.py b/archivebox/main.py
index f1032181..f2ac951c 100644
--- a/archivebox/main.py
+++ b/archivebox/main.py
@@ -576,7 +576,7 @@ def add(urls: Union[str, List[str]],
         log_crawl_started(new_snapshots)
         for new_snapshot in new_snapshots:
             # TODO: Check if we need to add domain to the Snapshot model
-            downloaded_file = save_file_as_source(new_snapshot.url, filename=f'{new_snapshot.timestamp}-crawl-{new_snapshot.url}.txt', out_dir=out_dir)
+            downloaded_file = save_file_as_source(new_snapshot.url, filename=f'{new_snapshot.timestamp}-crawl-{new_snapshot.domain}.txt', out_dir=out_dir)
             new_snapshots_depth += parse_snapshots_from_source(downloaded_file, root_url=new_snapshot.url)
 
     imported_snapshots = [Snapshot(url=snapshot.url) for snapshot in new_snapshots + new_snapshots_depth]