diff --git a/packages/backend/src/queue/types.ts b/packages/backend/src/queue/types.ts
index a2566d0cde9a..f2466f2e3d67 100644
--- a/packages/backend/src/queue/types.ts
+++ b/packages/backend/src/queue/types.ts
@@ -13,6 +13,7 @@ import type { ParsedSignature, PrivateKeyWithPem } from '@misskey-dev/node-http-
 
 /**
  * @peertube/http-signature 時代の古いデータにも対応しておく
+ * TODO: 2026年ぐらいには消す
  */
 export interface OldParsedSignature {
 	scheme: 'Signature';