diff --git a/README.md b/README.md
index cfe210d..7aafa83 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@ function is_disposable_email($email) {
   $path = realpath(dirname(__FILE__)) . '/disposable_email_blacklist.conf';
   $mail_domains_ko = file($path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
   $mail_domains_ko = array_fill_keys($mail_domains_ko, true);
-  $domain = mb_strtolower(explode('@', trim($email))[1])
+  $domain = mb_strtolower(explode('@', trim($email))[1]);
   return (isset($mail_domains_ko[$domain]) || array_key_exists($domain, $mail_domains_ko));
 }
 ```