diff --git a/bin/vhost.sh b/bin/vhost.sh
index 4a9788b..ac1a168 100755
--- a/bin/vhost.sh
+++ b/bin/vhost.sh
@@ -30,7 +30,7 @@ function vhost::set-phpVersion () {
 # crude but good enough domain name format validation
 function vhost::validate_domain () {
   local my_domain=$1
-  if [[ $my_domain =~ ^(([a-zA-Z](-?[a-zA-Z0-9])*)\.)+[a-zA-Z]{2,}$ ]] ; then
+  if [[ $my_domain =~ ^(([a-zA-Z0-9](-?[a-zA-Z0-9])*)\.)+[a-zA-Z]{2,}$ ]] ; then
     return 0
   else
     return 1