diff --git a/lib/constants.js b/lib/constants.js
index 8f052fc3..701a97d4 100644
--- a/lib/constants.js
+++ b/lib/constants.js
@@ -80,7 +80,7 @@ export const POSTGRESQL_DATE_FORMATS = {
   year: 'YYYY-01-01',
 };
 
-export const DOMAIN_REGEX = /^(localhost(:\d{1,5})?|((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63})$/;
+export const DOMAIN_REGEX = /^(localhost|((?=[a-z0-9-]{1,63}\.)(xn--)?[a-z0-9]+(-[a-z0-9]+)*\.)+[a-z]{2,63})(:[1-9]\d{0,4})?$/;
 
 export const DESKTOP_SCREEN_WIDTH = 1920;
 export const LAPTOP_SCREEN_WIDTH = 1024;