diff --git a/packages/backend/src/server/activitypub/cache.ts b/packages/backend/src/server/activitypub/cache.ts
index 4ebec77dc..00199ee25 100644
--- a/packages/backend/src/server/activitypub/cache.ts
+++ b/packages/backend/src/server/activitypub/cache.ts
@@ -1,6 +1,6 @@
-import { Cache } from "@/misc/cache";
-import { Note } from "@/models/entities/note";
-import { User } from "@/models/entities/user";
+import { Cache } from "@/misc/cache.js";
+import { Note } from "@/models/entities/note.js";
+import { User } from "@/models/entities/user.js";
 
 export const userCache = new Cache<User | null>(1000 * 60 * 30);
 export const noteCache = new Cache<Note | null>(1000 * 60 * 30);