diff --git a/README.md b/README.md
index 0a53304..b7c167d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # 哪吒监控
 
-![GitHub Workflow Status](https://img.shields.io/github/workflow/status/naiba/nezha/Dashboard%20image?label=管理面板%20v0.4.12&logo=github&style=for-the-badge) ![Agent release](https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github) ![GitHub Workflow Status](https://img.shields.io/github/workflow/status/naiba/nezha/Agent%20release?label=Agent%20CI&logo=github&style=for-the-badge) ![shell](https://img.shields.io/badge/安装脚本-v0.4.9-brightgreen?style=for-the-badge&logo=linux)
+![GitHub Workflow Status](https://img.shields.io/github/workflow/status/naiba/nezha/Dashboard%20image?label=管理面板%20v0.4.13&logo=github&style=for-the-badge) ![Agent release](https://img.shields.io/github/v/release/naiba/nezha?color=brightgreen&label=Agent&style=for-the-badge&logo=github) ![GitHub Workflow Status](https://img.shields.io/github/workflow/status/naiba/nezha/Agent%20release?label=Agent%20CI&logo=github&style=for-the-badge) ![shell](https://img.shields.io/badge/安装脚本-v0.4.9-brightgreen?style=for-the-badge&logo=linux)
 
 :trollface: 哪吒监控 一站式轻监控轻运维系统。支持系统状态、HTTP(SSL 证书变更、即将到期、到期)、TCP、Ping 监控报警，命令批量执行和计划任务。
 
diff --git a/cmd/dashboard/main.go b/cmd/dashboard/main.go
index c36b729..934ccbf 100644
--- a/cmd/dashboard/main.go
+++ b/cmd/dashboard/main.go
@@ -61,7 +61,7 @@ func initSystem() {
 }
 
 func cleanMonitorHistory() {
-	dao.DB.Delete(&model.MonitorHistory{}, "created_at < ?", time.Now().AddDate(0, -1, 0))
+	dao.DB.Delete(&model.MonitorHistory{}, "created_at < ?", time.Now().AddDate(0, 0, -30))
 }
 
 func loadServers() {
diff --git a/service/dao/dao.go b/service/dao/dao.go
index 2386ece..368a342 100644
--- a/service/dao/dao.go
+++ b/service/dao/dao.go
@@ -13,7 +13,7 @@ import (
 	pb "github.com/naiba/nezha/proto"
 )
 
-var Version = "v0.4.12" // ！！记得修改 README 重的 badge 版本！！
+var Version = "v0.4.13" // ！！记得修改 README 重的 badge 版本！！
 
 const (
 	SnapshotDelay = 3
diff --git a/service/monitor/monitor.go b/service/monitor/monitor.go
index 11a7bd9..cd6c7c5 100644
--- a/service/monitor/monitor.go
+++ b/service/monitor/monitor.go
@@ -26,6 +26,9 @@ type ipDotSbGeoIP struct {
 
 var netInSpeed, netOutSpeed, netInTransfer, netOutTransfer, lastUpdate uint64
 
+var cachedIP, country string
+var latestFetchIP time.Time
+
 func GetHost() *model.Host {
 	hi, _ := host.Info()
 	var cpuType string
@@ -46,23 +49,31 @@ func GetHost() *model.Host {
 	mv, _ := mem.VirtualMemory()
 	ms, _ := mem.SwapMemory()
 	u, _ := disk.Usage("/")
-	var ip ipDotSbGeoIP
-	resp, err := http.Get("https://api-ipv4.ip.sb/geoip")
-	if err == nil {
-		defer resp.Body.Close()
-		body, _ := ioutil.ReadAll(resp.Body)
-		json.Unmarshal(body, &ip)
-	}
-	resp, err = http.Get("https://api-ipv6.ip.sb/ip")
-	if err == nil {
-		defer resp.Body.Close()
-		body, _ := ioutil.ReadAll(resp.Body)
-		if ip.IP == "" {
-			ip.IP = string(body)
-		} else {
-			ip.IP = fmt.Sprintf("ip(v4: %s, v6: %s)", ip.IP, body)
+
+	if latestFetchIP.Before(time.Now().Add(time.Minute * -15)) {
+		var ip ipDotSbGeoIP
+		latestFetchIP = time.Now()
+		resp, err := http.Get("https://api-ipv4.ip.sb/geoip")
+		if err == nil {
+			defer resp.Body.Close()
+			body, _ := ioutil.ReadAll(resp.Body)
+			json.Unmarshal(body, &ip)
+			cachedIP = ip.IP
+			country = ip.CountryCode
+		}
+		resp, err = http.Get("https://api-ipv6.ip.sb/geoip")
+		if err == nil {
+			defer resp.Body.Close()
+			body, _ := ioutil.ReadAll(resp.Body)
+			if ip.IP == "" {
+				cachedIP = string(body)
+			} else {
+				cachedIP = fmt.Sprintf("ip(v4: %s, v6: %s)", ip.IP, body)
+			}
+			country = ip.CountryCode
 		}
 	}
+
 	return &model.Host{
 		Platform:        hi.OS,
 		PlatformVersion: hi.PlatformVersion,
@@ -73,8 +84,8 @@ func GetHost() *model.Host {
 		Arch:            hi.KernelArch,
 		Virtualization:  hi.VirtualizationSystem,
 		BootTime:        hi.BootTime,
-		IP:              ip.IP,
-		CountryCode:     strings.ToLower(ip.CountryCode),
+		IP:              cachedIP,
+		CountryCode:     strings.ToLower(country),
 		Version:         dao.Version,
 	}
 }
diff --git a/service/rpc/nezha.go b/service/rpc/nezha.go
index 23759ed..ac23add 100644
--- a/service/rpc/nezha.go
+++ b/service/rpc/nezha.go
@@ -26,7 +26,9 @@ func (s *NezhaHandler) ReportTask(c context.Context, r *pb.TaskResult) (*pb.Rece
 		var errMsg string
 		if strings.HasPrefix(r.GetData(), "SSL证书错误：") {
 			// 排除 i/o timeont、connection timeout、EOF 错误
-			if !strings.HasSuffix(r.GetData(), "timeout") && r.GetData() != "EOF" {
+			if !strings.HasSuffix(r.GetData(), "timeout") &&
+				r.GetData() != "EOF" &&
+				!strings.HasSuffix(r.GetData(), "timed out") {
 				errMsg = r.GetData()
 			}
 		} else {