Maybe object versioning can get added as this gains more and more usage... That will really make this a library that IMHO is production worthy; large applications can&#x27;t be easily upgraded in one-go and having a library that helps with translating across versions would be super.<p><a href="https:&#x2F;&#x2F;github.com&#x2F;marshmallow-code&#x2F;marshmallow&#x2F;issues&#x2F;171" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;marshmallow-code&#x2F;marshmallow&#x2F;issues&#x2F;171</a> (if anyone is interested).