diff --git a/fs2zammad b/fs2zammad
index 8b590c7..dc08171 100755
--- a/fs2zammad
+++ b/fs2zammad
@@ -303,14 +303,21 @@ with open("rt2zammad.json") as handle:
 h2t = html2text.HTML2Text()
 zammad = get_zammad_session()
 
+source_directory = "tickets/"
+if len(sys.argv) >= 2:
+    source_directory = sys.argv[1]
+if not os.path.isdir(source_directory):
+    print(f"Could not find source directory {source_directory}. Exiting.")
+    sys.exit(1)
+
 os.makedirs("users", exist_ok=True)
 os.makedirs("tickets", exist_ok=True)
 os.makedirs("attachments", exist_ok=True)
 os.makedirs("failed", exist_ok=True)
 os.makedirs("processed", exist_ok=True)
 
-ticket_ids = os.listdir("tickets/")
-print(f"Found {len(ticket_ids)} tickets on filesystem.")
+ticket_ids = os.listdir(source_directory)
+print(f"Found {len(ticket_ids)} tickets on filesystem (source directory: {source_directory})")
 ticket_ids = list(map(int, ticket_ids))
 ticket_ids.sort()