diff --git a/packages/backend-rs/src/service/push_notification.rs b/packages/backend-rs/src/service/push_notification.rs
index e56d502719..6a8e94d768 100644
--- a/packages/backend-rs/src/service/push_notification.rs
+++ b/packages/backend-rs/src/service/push_notification.rs
@@ -1,8 +1,9 @@
 use crate::database::db_conn;
 use crate::misc::get_note_summary::{get_note_summary, NoteLike};
 use crate::misc::meta::fetch_meta;
-use crate::model::entity::{access_token, sw_subscription};
+use crate::model::entity::{app, access_token, sw_subscription};
 use crate::util::http_client;
+use crate::util::id::get_timestamp;
 use once_cell::sync::OnceCell;
 use sea_orm::{prelude::*, DbErr};
 use web_push::{