diff --git a/lib/fast_jsonapi/object_serializer.rb b/lib/fast_jsonapi/object_serializer.rb index 6c56b2c..c72b22e 100644 --- a/lib/fast_jsonapi/object_serializer.rb +++ b/lib/fast_jsonapi/object_serializer.rb @@ -4,6 +4,7 @@ require 'active_support/time' require 'active_support/json' require 'active_support/concern' require 'active_support/inflector' +require 'active_support/core_ext/numeric/time' require 'fast_jsonapi/attribute' require 'fast_jsonapi/relationship' require 'fast_jsonapi/link'