diff --git a/app/models/webhook.rb b/app/models/webhook.rb
index 88078df..d2dc24e 100644
--- a/app/models/webhook.rb
+++ b/app/models/webhook.rb
@@ -28,7 +28,7 @@ class Webhook < ApplicationRecord
   has_many :webhook_requests
 
   validates :name, :presence => true
-  validates :url, :presence => true, :format => {:with => /\Ahttps?\:\/\/[a-z0-9\-\.\_\?\&\/\+]+\z/i, :allow_blank => true}
+  validates :url, :presence => true, :format => {:with => /\Ahttps?\:\/\/[a-z0-9\-\.\_\?\&\/\+:]+\z/i, :allow_blank => true}
 
   scope :enabled, -> { where(:enabled => true) }