title: How to Mix Sound Null Safety and Unsound Null Safety in Flutter
body: <p>I am building a Flutter app and I need to use the <code>flutter_redux</code> package for my global state management.</p>
  <p>Unfortunately when I added it and try to execute my app I am getting the below error:</p>
  <pre><code>Error: Cannot run with sound null safety, because the following dependencies
  don't support null safety:
  
   - package:redux
   - package:flutter_redux
  </code></pre>
  <p>Please, how can I resolve this?</p>