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[Home](./index.md) &gt; [ibm-cloud-sdk-core](./ibm-cloud-sdk-core.md) &gt; [UserOptions](./ibm-cloud-sdk-core.useroptions.md) &gt; [version](./ibm-cloud-sdk-core.useroptions.version.md)

## UserOptions.version property

The API version date to use with the service, in "YYYY-MM-DD" format.

**Signature:**

```typescript
version?: string;
```