requirement.txt future version

[Lavenderjiang]

When I run pip install requirements.txt, I got the error No matching distribution found for futures==3.2.0 (from -r requirements.txt (line 8)). After I manually change the version to 3.1.1, it works. I don't understand why and apparently other people are having this issue as well

[John-Almardeny]

Remove the version and just leave future and it will work.