diff --git a/packages/backend/src/server/api/endpoints/notes/bubble-timeline.ts b/packages/backend/src/server/api/endpoints/notes/bubble-timeline.ts
index 17c9b31c90..882e344883 100644
--- a/packages/backend/src/server/api/endpoints/notes/bubble-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/bubble-timeline.ts
@@ -1,3 +1,8 @@
+/*
+ * SPDX-FileCopyrightText: Marie and other Sharkey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
 import { Inject, Injectable } from '@nestjs/common';
 import { Brackets } from 'typeorm';
 import type { NotesRepository, MiMeta } from '@/models/_.js';