Heroku python app failing to build when installing sqlite3

Question

My Python app on Heroku failed to build consistently:

-----> Python app detected
 !     Python has released a security update! Please consider upgrading t         


        

Answer 1

See: https://travis-ci.org/heroku/heroku-buildpack-python

Upgrade the the stack from heroku-16 to heroku-18 in app.json.