diff --git a/packages/backend/migration/1731932268436-addBlockingReactionUser.js b/packages/backend/migration/1731932268436-addBlockingReactionUser.js
index 62033fb434..72067694fa 100644
--- a/packages/backend/migration/1731932268436-addBlockingReactionUser.js
+++ b/packages/backend/migration/1731932268436-addBlockingReactionUser.js
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export class AddBlockingReactionUser1731932268436 {
     name = 'AddBlockingReactionUser1731932268436'