The 2.5.1 version is not available in Pypi?

[edwardoliveira]

Hi, I am trying to install the latest version of pyoai (2.5.1) but when I issue the pip install pyoai==2.5.1 command it throws the following exception:

ERROR: Could not find a version that satisfies the requirement pyoai==2.5.1 (from versions: 2.1.4, 2.2, 2.2.1, 2.3, 2.3.1, 2.4, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.5.0)
ERROR: No matching distribution found for pyoai==2.5.1

Running the command pip index versions pyoai don't show the 2.5.1 version:

WARNING: pip index is currently an experimental command. It may be removed/changed in a future release without prior warning.
pyoai (2.5.0)
Available versions: 2.5.0, 2.4.5, 2.4.4, 2.4.3, 2.4.2, 2.4.1, 2.4, 2.3.1, 2.3, 2.2.1, 2.2, 2.1.4

The latest version is also not available on https://infrae.com/download/oaipmh

What I can be missing, please?