scrolltop with animate not working

$('#scroll-bottom').on('click', function() {
  $('html, body').animate({
    scrollTop: 2000
  }, 2000); // for all browsers
  
  // $('html').animate({scrollTop: 2000}, 2000); // works in Firefox and Chrome
  // $('body').animate({scrollTop: 2000}, 2000); // works in Safari
})

#top {
  margin-bottom: 2000px;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<div id="top">
  <button id="scroll-bottom">scroll</button>
</div>
<div>bottom</div>