diff --git a/README.md b/README.md
index fdae39b..a6ee360 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
   <br>
   <small><i>LOGO designed by <a href="https://xio.ng" target="_blank">熊大</a> .</i></small>
   <br><br>
-<img src="https://img.shields.io/github/actions/workflow/status/naiba/nezha/dashboard.yml?branch=master&label=Dash%20v0.14.8&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/actions/workflow/status/naiba/nezha/agent.yml?branch=v0.14.5&label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/badge/Installer-v0.11.1-brightgreen?style=for-the-badge&logo=linux">
+<img src="https://img.shields.io/github/actions/workflow/status/naiba/nezha/dashboard.yml?branch=master&label=Dash%20v0.14.9&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github">&nbsp;<img src="https://img.shields.io/github/actions/workflow/status/naiba/nezha/agent.yml?branch=v0.14.5&label=Agent%20CI&logo=github&style=for-the-badge">&nbsp;<img src="https://img.shields.io/badge/Installer-v0.11.1-brightgreen?style=for-the-badge&logo=linux">
   <br>
   <br>
   <p>:trollface: <b>Nezha Monitoring: Self-hosted, lightweight server and website monitoring and O&M tool.</b></p>
diff --git a/go.mod b/go.mod
index f312b76..c1172a0 100644
--- a/go.mod
+++ b/go.mod
@@ -39,7 +39,7 @@ require (
 	google.golang.org/grpc v1.50.1
 	google.golang.org/protobuf v1.28.1
 	gorm.io/driver/sqlite v1.4.3
-	gorm.io/gorm v1.24.0
+	gorm.io/gorm v1.24.2
 	sigs.k8s.io/yaml v1.3.0
 )
 
diff --git a/go.sum b/go.sum
index e64bb56..b792ca0 100644
--- a/go.sum
+++ b/go.sum
@@ -705,8 +705,9 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gorm.io/driver/sqlite v1.4.3 h1:HBBcZSDnWi5BW3B3rwvVTc510KGkBkexlOg0QrmLUuU=
 gorm.io/driver/sqlite v1.4.3/go.mod h1:0Aq3iPO+v9ZKbcdiz8gLWRw5VOPcBOPUQJFLq5e2ecI=
-gorm.io/gorm v1.24.0 h1:j/CoiSm6xpRpmzbFJsQHYj+I8bGYWLXVHeYEyyKlF74=
 gorm.io/gorm v1.24.0/go.mod h1:DVrVomtaYTbqs7gB/x2uVvqnXzv0nqjB396B8cG4dBA=
+gorm.io/gorm v1.24.2 h1:9wR6CFD+G8nOusLdvkZelOEhpJVwwHzpQOUM+REd6U0=
+gorm.io/gorm v1.24.2/go.mod h1:DVrVomtaYTbqs7gB/x2uVvqnXzv0nqjB396B8cG4dBA=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/service/singleton/servicesentinel.go b/service/singleton/servicesentinel.go
index 239133e..364d780 100644
--- a/service/singleton/servicesentinel.go
+++ b/service/singleton/servicesentinel.go
@@ -207,10 +207,13 @@ func (ss *ServiceSentinel) loadMonitorHistory() {
 
 	// 加载服务监控历史记录
 	var mhs []model.MonitorHistory
-	DB.Where("created_at >= ? AND created_at < ?", today.AddDate(0, 0, -29), today).Find(&mhs)
+	DB.Where("created_at > ? AND created_at < ?", today.AddDate(0, 0, -29), today).Find(&mhs)
 	var delayCount = make(map[int]int)
 	for i := 0; i < len(mhs); i++ {
 		dayIndex := 28 - (int(today.Sub(mhs[i].CreatedAt).Hours()) / 24)
+		if dayIndex < 0 {
+			continue
+		}
 		ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Delay[dayIndex] = (ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Delay[dayIndex]*float32(delayCount[dayIndex]) + mhs[i].AvgDelay) / float32(delayCount[dayIndex]+1)
 		delayCount[dayIndex]++
 		ServiceSentinelShared.monthlyStatus[mhs[i].MonitorID].Up[dayIndex] += int(mhs[i].Up)
diff --git a/service/singleton/singleton.go b/service/singleton/singleton.go
index 88c8e30..e181ac5 100644
--- a/service/singleton/singleton.go
+++ b/service/singleton/singleton.go
@@ -12,7 +12,7 @@ import (
 	"github.com/naiba/nezha/pkg/utils"
 )
 
-var Version = "v0.14.8" // ！！记得修改 README 中的 badge 版本！！
+var Version = "v0.14.9" // ！！记得修改 README 中的 badge 版本！！
 
 var (
 	Conf  *model.Config