# GlobalSystemVersion

> The current change version number in this SystemState.World.

## Definition

* **Type:** Property
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public uint GlobalSystemVersion { get; }
```

### Remarks

The system updates the component version numbers inside any [ArchetypeChunk](/engine/7000.0/script-reference/unity/entities/archetypechunk.md) instances that this system accesses with write permissions to this value.