diff --git a/lib/delorean.rb b/lib/delorean.rb
index 53ddeb1..04ff8a3 100644
--- a/lib/delorean.rb
+++ b/lib/delorean.rb
@@ -25,7 +25,7 @@ class << DateTime
     alias_method :now_without_delorean, :now
 
     def now(sg=Date::ITALY)
-      self.iso8601( Time.now.to_datetime.iso8601, sg )
+      self.iso8601( Time.now.to_datetime.iso8601(3), sg )
     end
   end
 end