I am new to Heroku and I am trying to deploy a python flask app into Heroku, but in doing so, I got the message:
Could not find a version that satisfies the requirement futures==3.2.0 (from -r /tmp/build_b6e63e1db9605f37d761ae7a911fd5b1/requirements.txt (line 7)) (from versions: 0.2.python3, 0.1, 0.2, 1.0, 2.0, 2.1, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5, 2.1.6, 2.2.0, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.1.0, 3.1.1)
I am trying with Python 2.7 and 3.7 version, but I still get the same error. Can any one advise me on this?