diff --git a/app/models/link.cr b/app/models/link.cr
index c2b99f0..c0bec23 100644
--- a/app/models/link.cr
+++ b/app/models/link.cr
@@ -17,6 +17,6 @@ module App::Models
     unique_constraint :slug
 
     validate_required [:slug, :url]
-    validate_format :url, /\Ahttps?:\/\/(?:[\w.-]+)(?::\d+)?(?:[\/?#]\S*)?\z/i
+    validate_format :url, /\A(?:(https?:\/\/)?(?:[\w-]+\.)+[a-z]{2,})(?::\d+)?(?:[\/?#]\S*)?\z/i
   end
 end