> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 4.0.0-rc9 **`(fix):`** All Pydantic V2 warnings have been resolved ### What's been fixed * json\_encoders have been removed from Pydantic V2, and replaced with a `model_serializer` method. * additional model construction functions have been added when not leveraging pydantic field aliases to allow users to construct a model from JSOn without the need for dealiasing the object themselves.