Upgrade nativeauthenticator in tljh

Following this thread, I need to upgrade native authenticator. I couldn’t find the authenticator in pip list, so after some research:

./opt/tljh/hub/lib/python3.6/site-packages/jupyterhub_nativeauthenticator-0.0.5.dist-info
./opt/tljh/hub/lib/python3.6/site-packages/nativeauthenticator
./opt/tljh/hub/lib/python3.6/site-packages/nativeauthenticator/nativeauthenticator.py
./opt/tljh/hub/lib/python3.6/site-packages/nativeauthenticator/pycache/nativeauthenticator.cpython-36.pyc

How can I safely upgrade it?

thank you