 <p>You shouldn't need the html5shiv if you're using Modernizr, as Modernizr includes the same functionality itself.</p> <p>Quote from the Modernizr homepage:</p> <blockquote> <p>Lastly, Modernizr also adds support for styling and printing HTML5 elements. This allows you to use more semantic, forward-looking elements such as <code>&lt;section&gt;</code>, <code>&lt;header&gt;</code> and <code>&lt;dialog&gt;</code> without having to worry about them not working in Internet Explorer.</p> </blockquote>