diff --git a/packages/backend/migration/1690782653311-SensitiveChannel.js b/packages/backend/migration/1690782653311-SensitiveChannel.js
index 5779172c44..e76dda5180 100644
--- a/packages/backend/migration/1690782653311-SensitiveChannel.js
+++ b/packages/backend/migration/1690782653311-SensitiveChannel.js
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export class SensitiveChannel1690782653311 {
 	name = 'SensitiveChannel1690782653311'