diff --git a/packages/backend/src/boot/ready.ts b/packages/backend/src/boot/ready.ts
index 2339fa935a..591ae5cb58 100644
--- a/packages/backend/src/boot/ready.ts
+++ b/packages/backend/src/boot/ready.ts
@@ -1 +1,6 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 export const readyRef = { value: false };
diff --git a/packages/backend/src/server/HealthServerService.ts b/packages/backend/src/server/HealthServerService.ts
index 086de62676..811e8607f9 100644
--- a/packages/backend/src/server/HealthServerService.ts
+++ b/packages/backend/src/server/HealthServerService.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { Inject, Injectable } from '@nestjs/common';
 import * as Redis from 'ioredis';
 import { DataSource } from 'typeorm';