diff --git a/antp/updater.py b/antp/updater.py
index 8a1e898..1cb92ef 100644
--- a/antp/updater.py
+++ b/antp/updater.py
@@ -1,3 +1,7 @@
+# Updater updates previously imported note types.
+# Copyright: Ren Tatsumoto <tatsu at autistici.org>
+# License: GNU GPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
+
 from typing import Any
 
 from .ankiconnect import invoke, request_model_names