> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 2.24.2 **`(fix):`** Fix `JsonSerializableType::jsonDeserialize` throwing `Unexpected non-string type for date.` when a `#[Date]`-annotated property receives an explicit JSON `null`. Nullable date and date-time fields now deserialize `null` to `null`, matching how omitted keys and the serializer already behave; non-string, non-null values are still rejected.