diff --git a/src/schedules/EventWatchSchedule.ts b/src/schedules/EventWatchSchedule.ts
index 96423fb..ed0c4c6 100644
--- a/src/schedules/EventWatchSchedule.ts
+++ b/src/schedules/EventWatchSchedule.ts
@@ -58,7 +58,7 @@ export class EventWatchSchedule implements Schedule {
   start() {
     const schedule = nodeSchedule.scheduleJob('event-watch', {
       minute: [0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55],
-      hour: '7-23',
+      hour: new nodeSchedule.Range(7, 23),
     }, () => this.watchEvents());
     console.debug('Start schedule:', schedule.name);
   }