title: pip install the latest version
body: <p>I am new to python and django. In my requirements\common.txt I have the following line with version:</p>
  
  <p><code>django-simple-captcha==0.5.*</code></p>
  
  <p>the problem is that when I run <code>pip install -r requirements\common.txt</code>, as I have version 0.5.3 of that package, it wouldn't update it to latest version (0.5.6), only <code>pip --upgrade requirements\common.txt</code> would upgrade to latest version. Is there anyway to modify <code>common.txt</code> file so running <code>pip install</code> installs the latest version?</p>
  
  <p>I am asking because this file is going to be used by a couple of developers and if they have for example version 0.5.3 of that package already, it would'nt upgrade it and there are lots of packages needing upgrade.</p>
  
  <p>tnx</p>