title: Could not find any downloads that satisfy the requirement pypm==1.3.4
body: <p>Error on pushing to heroku : "Could not find any downloads that satisfy the requirement pypm==1.3.4" </p>
  
  <p>As suggested in <a href="https://stackoverflow.com/questions/13222440/django-failed-to-push-some-refs-to-githeroku-com">Django - failed to push some refs to git@heroku.com</a>, I did </p>
  
  <pre><code>"pip install --upgrade -r requirements.txt"
  </code></pre>
  
  <p>Heroku was not able to install from requirements file the pypm package. 
  The error was:</p>
  
  <blockquote>
    <p>Downloading/unpacking pypm==1.3.4 (from -r requirements.txt (line 11))<br>
    Could not find any downloads that satisfy the requirement pypm==1.3.4 (from -r requirements.txt (line1 1)).<br>
    No distributions at all found for pypm==1.3.4 (from -r requirements.txt (line 11))</p>
  </blockquote>
  
  <p>Does anyone have any clue how to resolve this?</p>