# version

> Importer version number used by the import layer to detect a new version of the importer.

## Definition

* **Type:** Property
* **Namespace:** [UnityEditor.AssetImporters](/engine/6000.6/script-reference/unityeditor/assetimporters.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public int version { get; }
```

### Remarks

The import layer uses this version number to trigger re-imports when there is a new version and apply the latest changes made to the scripted importer.

### Examples

```csharp
using UnityEngine;
using UnityEditor.AssetImporters;

[ScriptedImporter(1, "sphere")]
public class SphereImporter : ScriptedImporter
{
    public override void OnImportAsset(AssetImportContext ctx)
    {
        // ...
    }
}
```