diff --git a/lib/sf/reg_item.rb b/lib/sf/reg_item.rb
index 40d4b0b..f22ffb0 100644
--- a/lib/sf/reg_item.rb
+++ b/lib/sf/reg_item.rb
@@ -18,7 +18,7 @@ def create_from_reg_item_for(sf_reg_id)
     attrs = {}
     self.reg_item_mapping.each do |reg_item_attr, sf_reg_item_attr|
       reg_item_value = self.reg_item.send(reg_item_attr)
-      reg_item_value = reg_item_value.iso8601 if reg_item_value.eql?(ActiveSupport::TimeWithZone)
+      reg_item_value = reg_item_value.iso8601 if reg_item_value.class.eql?(ActiveSupport::TimeWithZone)
       attrs[sf_reg_item_attr] = reg_item_value unless reg_item_value.nil?
     end
     attrs['reg_registration_id__c'] = sf_reg_id
diff --git a/lib/sf/version.rb b/lib/sf/version.rb
index 50f684a..fb82fbc 100644
--- a/lib/sf/version.rb
+++ b/lib/sf/version.rb
@@ -1,3 +1,3 @@
 module Sf
-  VERSION = "0.1.36"
+  VERSION = "0.1.37"
 end