diff --git a/install.sh b/install.sh
index 8248c92..f483831 100644
--- a/install.sh
+++ b/install.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # install preconditions
 apt update
 apt dist-upgrade -y
@@ -11,4 +13,6 @@ nmcli con mod "eth0" ipv4.dns "192.168.178.5 8.8.8.8"
 nmcli con mod "eth0" ipv4.method manual
 nmcli con up "eth0"
 
+# install ntp
+apt install chrony -y