diff --git a/app/models/seminar_link.rb b/app/models/seminar_link.rb
index 2009008..a992765 100644
--- a/app/models/seminar_link.rb
+++ b/app/models/seminar_link.rb
@@ -12,7 +12,7 @@ class SeminarLink
 
   before_validation :add_http
   
-  validates :url, :presence => true, :format => /\A(http|https):\/\/(([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5})|((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(:[0-9]{1,5})?(\/.*)?\Z/i
+  #validates :url, :presence => true, :format => /\A(http|https):\/\/(([a-z0-9]+([\-\.]{1}[a-z0-9]+)*\.[a-z]{2,5})|((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(:[0-9]{1,5})?(\/.*)?\Z/i
 
   protected