diff --git a/switch.go b/switch.go
index 7fc7175..097044f 100644
--- a/switch.go
+++ b/switch.go
@@ -54,17 +54,27 @@ func (swi *Switch) Run(addr string, ipregion string) {
 	swi.ipregion = regexp.MustCompile(ipregion)
 
 	cmd := exec.Command("/bin/sh", "-c", "sudo iptables -t nat -N IPSWITCH")
-	cmd.Output()
+	cmd.Run()
+	if err := cmd.Process.Release(); err != nil {
+		panic(err)
+	}
 
 	cmd = exec.Command("/bin/sh", "-c", "sudo iptables -t nat -F IPSWITCH")
-	cmd.Output()
+	cmd.Run()
+	if err := cmd.Process.Release(); err != nil {
+		panic(err)
+	}
 
 	for range swi.Worker.ForLoop {
 		cmd := exec.Command("/bin/sh", "-c", "sudo iptables -t nat -A IPSWITCH  -p icmp -s 1.1.1.1  -j DNAT --to 1.1.1.1:8885")
-		_, err := cmd.Output()
+		err := cmd.Run()
 		if err != nil {
 			panic(err)
 		}
+
+		if err := cmd.Process.Release(); err != nil {
+			panic(err)
+		}
 	}
 
 	http.ListenAndServe(addr, nil)