diff --git a/lib/nylas/model/attributes.rb b/lib/nylas/model/attributes.rb
index 1dfe324b..0860ebc6 100644
--- a/lib/nylas/model/attributes.rb
+++ b/lib/nylas/model/attributes.rb
@@ -33,7 +33,7 @@ def merge(new_data)
       def to_h(keys: attribute_definitions.keys)
         keys.each_with_object({}) do |key, casted_data|
           value = attribute_definitions[key].serialize(self[key])
-          casted_data[key] = defaulted_value(value)
+          casted_data[key] = value unless value.nil?
         end
       end
 
@@ -44,13 +44,6 @@ def serialize(keys: attribute_definitions.keys)
       private def default_attributes
         attribute_definitions.keys.zip([]).to_h
       end
-
-      private def defaulted_value(value)
-        result = value unless value.nil? || (value.respond_to?(:empty?) && value.empty?)
-        result ||= [] if value.is_a?(Array)
-        result ||= "" unless [true, false].include?(value)
-        result
-      end
     end
   end
 end