title: Composer error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
body: <p>While attempting to clean up our project dependencies, composer is failing with the errors:</p>
  <pre><code>The &quot;https://packagist.drupal-composer.org/packages.json&quot; file could not be downloaded: SSL operation failed with code 1. OpenSSL Error messages:
  error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
  Failed to enable crypto
  failed to open stream: operation failed
  https://packagist.drupal-composer.org could not be fully loaded, package information was loaded from the local cache and may be out of date 
  </code></pre>
  <p>This is happening on a vagrant CentOS 7 box.</p>