Pip install requests not working in precise build

I have a Java app that I’m building that contains a Python script I want to run. The python script uses the requests module. I try to install requests, but it gives me an error: “Could not find any downloads that satisfy the requirement”. The version of python on the server is 2.7 and the pip is 6.0.8. I thought it might be because the pip version is old, so I tried to update pip with pip install --upgrade pip but that command gives me the same error. Does anyone have any insights?