diff --git a/app/services/contact_details/website.rb b/app/services/contact_details/website.rb
index d1f4fd8f11978f4a9cff7608e766936f7ac15cf7..583b03029c123f1b8537cfd7e7447de626f53598 100644
--- a/app/services/contact_details/website.rb
+++ b/app/services/contact_details/website.rb
@@ -4,7 +4,7 @@ class ContactDetails::Website < ContactDetails::Base
   protected
 
   def prepare_url
-    @url = @string
+    @url = @string.to_s
     @url = "#{PROTOCOL}#{@url}" unless @url.start_with? PROTOCOL
   end