-<p><?php _e( 'The update process may take a little while, so please be patient.' ); ?></p>
-<p class="step"><a class="button button-large" href="upgrade.php?step=1&backto=<?php echo $goback; ?>"><?php _e( 'Update WordPress Database' ); ?></a></p>
+<p><?php _e( 'The database update process may take a little while, so please be patient.' ); ?></p>
+<p class="step"><a class="button button-large button-primary" href="upgrade.php?step=1&backto=<?php echo $goback; ?>"><?php _e( 'Update WordPress Database' ); ?></a></p>