diff --git a/config.json b/config.json
index 3e4af35..0ceaf2e 100644
--- a/config.json
+++ b/config.json
@@ -1,4 +1,5 @@
 {
    "Interval": "1s",
-   "States": ["NC"]
+   "States": ["NC"],
+   "Once": true
 }
diff --git a/config/config.go b/config/config.go
index 79838ca..8c621a1 100644
--- a/config/config.go
+++ b/config/config.go
@@ -12,6 +12,7 @@ type Config struct {
 	Interval Duration
 	States   []State
 	Storage  []string
+	Once     bool
 
 	lock sync.Mutex
 	db   storage.DB
diff --git a/main.go b/main.go
index cbd26ec..0b81c1e 100644
--- a/main.go
+++ b/main.go
@@ -22,8 +22,12 @@ func _main() error {
 		if err := once(); err != nil {
 			return err
 		}
+		if config.Get().Once {
+			break
+		}
 		time.Sleep(config.Get().Interval.Get())
 	}
+	return nil
 }
 
 func once() error {