# NumPy 1.18.5 Release Notes

This is a short release to allow pickle `protocol=5` to be used in Python3.5. It is motivated by the recent backport of pickle5 to Python3.5.

The Python versions supported in this release are 3.5-3.8. Downstream developers should use Cython >= 0.29.15 for Python 3.8 support and OpenBLAS >= 3.7 to avoid errors on the Skylake architecture.

## Contributors

A total of 3 people contributed to this release. People with a “+” by their names contributed a patch for the first time.

- Charles Harris

- Matti Picus

- Siyuan Zhuang +

## Pull requests merged

A total of 2 pull requests were merged for this release.

- #16439: ENH: enable pickle protocol 5 support for python3.5

- #16441: BUG: relpath fails for different drives on windows