Vertically center list item content with Flexbox?

I have the following simple list...

ul{background:wheat;height:200px;text-align:center;}
li{height:200px;display:inline-block;margin-right:10px;background:green;color:white;}

<ul>
  <li>Item 1</li>
  <li>Item 2</li>
  <li>Item 3</li>
  <li>Item 4</li>
  <li>Item 5</li>
</ul>

I am trying to get the item contents to be vertically centered, is flexbox the way to do this?