Update pipx ?

pipx on a fresh 4.11 install is version:

$pipx --version

As we also have python 3.9.2 installed, pipx becomes unusable.
See install poetry with pipx fails : TypeError: __init__() got an unexpected keyword argument 'encoding' · Issue #702 · pypa/pipx · GitHub

How can I upgrade to pipx version 0.16.3 or when will it be available in the repos?
Anyone had similar probs?