diff --git a/wireguard-install.sh b/wireguard-install.sh
index f26001f..6078c94 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -102,7 +102,7 @@ new_client_dns () {
 	echo "   6) AdGuard"
 	echo "   7) AliDNS"
 	read -p "DNS server [1]: " dns
-	until [[ -z "$dns" || "$dns" =~ ^[1-6]$ ]]; do
+	until [[ -z "$dns" || "$dns" =~ ^[1-7]$ ]]; do
 		echo "$dns: invalid selection."
 		read -p "DNS server [1]: " dns
 	done