diff --git a/wireguard-install.sh b/wireguard-install.sh
index 59f7946..d450d99 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -212,9 +212,9 @@ function newClient() {
 
 	echo ""
 	echo "Tell me a name for the client."
-	echo "Use one word only, no special characters."
+	echo "The name must consist of alphanumeric character. It may also include an underscore or a dash."
 
-	until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_]+$ && ${CLIENT_EXISTS} == '0' ]]; do
+	until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_-]+$ && ${CLIENT_EXISTS} == '0' ]]; do
 		read -rp "Client name: " -e CLIENT_NAME
 		CLIENT_EXISTS=$(grep -c -E "^### Client ${CLIENT_NAME}\$" "/etc/wireguard/${SERVER_WG_NIC}.conf")