> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/sdks/backend-sdk/selphid/release_notes/6.9.0_releasenotes.md).

# 6.9.0

In this version, the facial extraction and passive liveness check engines have been updated. In addition to improvements in result accuracy, occlusion detection and closed-eye detection have been improved.

### Improved

* New version of the facial extraction engine, with improvements in accuracy, occlusion detection and performance.
* New version of the liveness check engine, with improvements in the closed-eye detector, mouth occlusions and performance.

### Changed

* The ranges of the threshold constants are unified to `[0, 100]`.
* Environment variable `FACEPHI_SELPHID_FACIALAUTHENTICATION_THRESHOLD` in the range `[0, 100]`. Default value `65`.
* Environment variable `FACEPHI_SELPHID_FACIALLIVENESS_THRESHOLD` in the range `[0, 100]`. Default value `50`.