diff --git a/src/script/timer-service.ts b/src/script/timer-service.ts
index 7c73778..effce5d 100644
--- a/src/script/timer-service.ts
+++ b/src/script/timer-service.ts
@@ -53,7 +53,7 @@ let timerService: TimerService;
 export async function timerServiceSingleton(): Promise<TimerService> {
   if (!timerService) {
     const db = await idb.openDB(dbName, dbVersion, {
-      upgrade(db, _oldVersion, newVersion, _transaction) {
+      upgrade(db, _oldVersion, newVersion) {
         if (newVersion === 1) {
           db.createObjectStore(
             storeName,
@@ -68,4 +68,4 @@ export async function timerServiceSingleton(): Promise<TimerService> {
     timerService = new IDBTimerService(db);
   }
   return timerService;
-}
\ No newline at end of file
+}