diff --git a/wireguard-install.sh b/wireguard-install.sh
index a6248c7..011e718 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -29,9 +29,11 @@ function checkVirt() {
 function checkOS() {
 	# Check OS version
 	if [[ -e /etc/debian_version ]]; then
+		# shellcheck disable=SC1091
 		source /etc/os-release
 		OS=$ID # debian or ubuntu
 	elif [[ -e /etc/fedora-release ]]; then
+		# shellcheck disable=SC1091
 		source /etc/os-release
 		OS=$ID
 	elif [[ -e /etc/centos-release ]]; then
@@ -72,6 +74,7 @@ function installWireGuard() {
 	done
 
 	until [[ "$SERVER_WG_NIC" =~ ^[a-zA-Z0-9_]+$ ]]; do
+		# shellcheck disable=SC2034
 		read -rp "WireGuard interface name: " -e -i wg0 SERVER_WG_NIC
 	done
 
@@ -145,6 +148,7 @@ PrivateKey = $SERVER_PRIV_KEY" >"/etc/wireguard/$SERVER_WG_NIC.conf"
 
 	if [ -x "$(command -v firewall-cmd)" ]; then
 		FIREWALLD_IPV4_ADDRESS=$(echo "$SERVER_WG_IPV4" | cut -d"." -f1-3)".0"
+		# shellcheck disable=SC2001
 		FIREWALLD_IPV6_ADDRESS=$(echo "$SERVER_WG_IPV6" | sed 's/:[^:]*$/:0/')
 		echo "PostUp = firewall-cmd --add-port $SERVER_PORT/udp && firewall-cmd --add-rich-rule='rule family=ipv4 source address=$FIREWALLD_IPV4_ADDRESS/24 masquerade' && firewall-cmd --add-rich-rule='rule family=ipv6 source address=$FIREWALLD_IPV6_ADDRESS/24 masquerade'
 PostDown = firewall-cmd --remove-port $SERVER_PORT/udp && firewall-cmd --remove-rich-rule='rule family=ipv4 source address=$FIREWALLD_IPV4_ADDRESS/24 masquerade' && firewall-cmd --remove-rich-rule='rule family=ipv6 source address=$FIREWALLD_IPV6_ADDRESS/24 masquerade'" >>"/etc/wireguard/$SERVER_WG_NIC.conf"
@@ -185,6 +189,7 @@ net.ipv6.conf.all.forwarding = 1" >/etc/sysctl.d/wg.conf
 
 function newClient() {
 	# Load params
+	# shellcheck disable=SC1091
 	source /etc/wireguard/params
 
 	if [[ $SERVER_PUB_IP =~ .*:.* ]]; then