diff --git a/cmd/svc/main.go b/cmd/svc/main.go
index 52f4a55..88a9ff6 100644
--- a/cmd/svc/main.go
+++ b/cmd/svc/main.go
@@ -22,7 +22,6 @@ import (
 var cfgPath string = "./config.yml"
 
 func main() {
-
 	flag.StringVar(&cfgPath, "c", "./config.yml", "config yaml path")
 	flag.Parse()
 
@@ -106,6 +105,7 @@ func runService(reload <-chan struct{}) {
 			if err := stopServer(svc); err != nil {
 				log.Fatal(err)
 			}
+			svc = nil
 		}
 	}
 }
diff --git a/config.yml.sample b/config.yml.sample
index 02386f6..c41812c 100644
--- a/config.yml.sample
+++ b/config.yml.sample
@@ -7,3 +7,7 @@ listens:
       path: /t
       headers: {}
       script: /tmp/run.sh
+
+cron_jobs:
+  - cron_time: '0 1 * * *'
+    script: /tmp/run.sh
diff --git a/go.mod b/go.mod
index 051b937..0bb4798 100644
--- a/go.mod
+++ b/go.mod
@@ -24,6 +24,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/otakukaze/envconfig v1.0.4 // indirect
+	github.com/robfig/cron/v3 v3.0.0 // indirect
 	github.com/ugorji/go/codec v1.2.6 // indirect
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a // indirect
 	golang.org/x/sys v0.0.0-20210611083646-a4fc73990273 // indirect
diff --git a/go.sum b/go.sum
index f7d8b09..3677b92 100644
--- a/go.sum
+++ b/go.sum
@@ -48,6 +48,8 @@ github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/robfig/cron/v3 v3.0.0 h1:kQ6Cb7aHOHTSzNVNEhmp8EcWKLb4CbiMW9h9VyIhO4E=
+github.com/robfig/cron/v3 v3.0.0/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE=
 github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
diff --git a/pkg/config/config.go b/pkg/config/config.go
index 3931f42..f152798 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -7,19 +7,26 @@ import (
 	"strings"
 
 	errors "github.com/pkg/errors"
+	"github.com/robfig/cron/v3"
 
 	confLoader "github.com/otakukaze/config-loader"
 )
 
 type Config struct {
-	Server  Server   `yaml:"server"`
-	Listens []Listen `yaml:"listens"`
+	Server   Server    `yaml:"server"`
+	Listens  []Listen  `yaml:"listens"`
+	CronJobs []CronJob `yaml:"cron_jobs"`
 }
 
 type Server struct {
 	Port int `yaml:"port" env:"SERVER_PORT" default:"10230"`
 }
 
+type CronJob struct {
+	CronTime string `yaml:"cron_time"`
+	Script   string `yaml:"script"`
+}
+
 type Listen struct {
 	HTTP *HTTPListen `yaml:"http"`
 }
@@ -88,5 +95,19 @@ func Load(p ...string) (*Config, error) {
 		}
 	}
 
+	// check cronJob
+	cronParser := cron.NewParser(cron.Minute | cron.Hour | cron.Dom | cron.Month | cron.Dow)
+	for _, v := range cfg.CronJobs {
+		_, err := cronParser.Parse(v.CronTime)
+		if err != nil {
+			return nil, err
+		}
+
+		// check script exists
+		if !tools.CheckExists(v.Script, false) {
+			return nil, errors.WithStack(fmt.Errorf("cron (%s) script not exists: %s\n", v.CronTime, v.Script))
+		}
+	}
+
 	return cfg, nil
 }
diff --git a/pkg/set/set.go b/pkg/set/set.go
index 6cd08c8..d0a9366 100644
--- a/pkg/set/set.go
+++ b/pkg/set/set.go
@@ -22,7 +22,7 @@ func (s Set) Size() int {
 func (s Set) Keys() []interface{} {
 	keys := make([]interface{}, 0)
 
-	for k, _ := range s {
+	for k := range s {
 		keys = append(keys, k)
 	}