diff --git a/main.go b/main.go
index f100ea2..a2d8323 100644
--- a/main.go
+++ b/main.go
@@ -8,12 +8,14 @@ import (
 	"io"
 	"net/http"
 	"strings"
+	"sync"
 	"time"
 )
 
 var (
 	shellyFlag = flag.String("s", "", "list shelly ips, comma seperated")
 	debugFlag  = flag.Bool("d", false, "enable debug mode")
+	wg         sync.WaitGroup
 )
 
 const (
@@ -102,6 +104,8 @@ func main() {
 		log.Fatal("no shelly ips specified")
 	}
 
+	wg := new(sync.WaitGroup)
+
 	for _, ip := range strings.Split(*shellyFlag, ",") {
 		go func() {
 			err := checkShelly(ip)
@@ -110,9 +114,13 @@ func main() {
 			}
 		}()
 	}
+
+	wg.Wait()
 }
 
 func checkShelly(ip string) error {
+	wg.Add(1)
+	defer wg.Done()
 	log.Infof("shelly worker %s started", ip)
 
 	for {