# fieldTypes

{% hint style="info" %}
#### Experimental Feature

This configuration entry is related to an Experimental (Optional) feature called Refined Types. Before you start to configure this section, make sure to read the page specific for this feature (accessible [here](../../optional-features/schema-improvements/refined-types)) and [this](../../concepts/experimental-features) page that explains how to enable Experimental Features.
{% endhint %}

### Type: [Map](../types-and-objects/map)<[FileModelColumn](../types-and-objects/file-model-column), [ImportedType](../types-and-objects/imported-type)>

<details>

<summary>Versioning History</summary>

**API Version v2.0.0** - Introduced `fieldTypes` configuration option.

</details>

Change the type of a model field defined by the key of this key-value pair to the type defined by the value of this key-value pair. To configure refined types, add the following lines to your configuration object:

{% code title="prisma-util.config.mjs" %}
```javascript
export default {
    // Other configuration lines
    fieldTypes: {
        "file1:model.column": "file2:Type"
    }
};
```
{% endcode %}
