diff --git a/Rocksolid_Light/common/register.php b/Rocksolid_Light/common/register.php
index 9df4067..0cddf6e 100644
--- a/Rocksolid_Light/common/register.php
+++ b/Rocksolid_Light/common/register.php
@@ -178,7 +178,7 @@ foreach($users as $user) {
   } 
 }
 
-if (!preg_match("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$^",$user_email)) {
+if (!preg_match("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z0-9]{2,3})$^",$user_email)) {
   echo "Email must be in the form of an email address\r\n";
   echo '<br /><a href="register.php">Back</a>';
   exit(2);