## Version 1.3.9.0 Release Notes

Compatible with OpenSearch 1.3.9

### Enhancements

* Change initial size of DocIdSetBuilder ([#502](https://github.com/opensearch-project/k-NN/pull/502))


### Infrastructure

* Increment version to 1.3.9 ([#749](https://github.com/opensearch-project/k-NN/pull/749))