diff --git a/src/monitoring/entity.ts b/src/monitoring/entity.ts
index 3561b35..3929915 100644
--- a/src/monitoring/entity.ts
+++ b/src/monitoring/entity.ts
@@ -19,7 +19,6 @@ export class Monitor {
 
 	@Column('datetime', {
 		nullable: false,
-		default: dayjs(),
 		transformer: {
 			to: (value?: Dayjs) => (value ?? dayjs()).format(),
 			from: (value: Date) => dayjs(value),
diff --git a/src/monitoring/service.ts b/src/monitoring/service.ts
index 6abe540..4631293 100644
--- a/src/monitoring/service.ts
+++ b/src/monitoring/service.ts
@@ -2,6 +2,7 @@ import { Injectable } from '@nestjs/common'
 import { InjectRepository } from '@nestjs/typeorm'
 import { Repository } from 'typeorm'
 
+import dayjsTz from '../common/dayjs'
 import { Monitor, MonitorType } from './entity'
 
 @Injectable()
@@ -13,7 +14,7 @@ export class MonitorsService {
 
 	async performMonitor(type: MonitorType, data: string) {
 		await this.monitorsRepository.save(
-			this.monitorsRepository.create({ type, data }),
+			this.monitorsRepository.create({ type, data, createdAt: dayjsTz() }),
 		)
 	}
 }