diff --git a/library/extensions/header-extensions.php b/library/extensions/header-extensions.php
index d2adca5..f3e4910 100644
--- a/library/extensions/header-extensions.php
+++ b/library/extensions/header-extensions.php
@@ -408,6 +408,52 @@ function thematic_show_pingback() {
     }
 }
 
+
+/**
+ * Add html5 shiv for older browser compatibility
+ * 
+ * Filter: thematic_modernizr_handles
+ * Filter: thematic_use_html5shiv
+ * Filter: thematic_html5shiv
+ * 
+ * @since 2.0
+ */
+function thematic_add_html5shiv() {
+	
+	$use_shiv = true;
+	
+	// List of handles to look for. These scripts make the html5shiv unnecessary
+	$possible_handles = array(
+		'modernizr',
+		'modernizr-js'
+	);
+	
+	// Allow themes to add their handles
+	$possible_handles = apply_filters( 'thematic_modernizr_handles', $possible_handles );
+	
+	// Check if any other scripts has been enqueued
+	foreach( $possible_handles as $handle) {
+		if( wp_script_is( $handle, 'queue' ) )
+			$use_shiv = false;
+	}
+	
+	// Allow themes/plugins to switch off the shiv
+	$use_shiv = apply_filters( 'thematic_use_html5shiv', $use_shiv );
+	
+	// Output script link
+	if( $use_shiv ) {
+		$content  = '<!--[if lt IE 9]>' . "\n";
+		$content .= '<script src="' . get_template_directory_uri() . '/library/js/html5.js"></script>' . "\n";
+		$content .= '<![endif]-->';
+	
+		echo apply_filters( 'thematic_html5shiv', $content );
+	}
+	
+}
+
+add_action( 'wp_head', 'thematic_add_html5shiv', 20 );
+
+
 /**
  * Add the default stylesheet to the head of the document.
  * 
diff --git a/library/js/html5.js b/library/js/html5.js
new file mode 100644
index 0000000..b12379e
--- /dev/null
+++ b/library/js/html5.js
@@ -0,0 +1,11 @@
+/*
+ HTML5 Shiv v3.7.0 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
+*/
+(function(j,f){function s(a,b){var c=a.createElement("p"),m=a.getElementsByTagName("head")[0]||a.documentElement;c.innerHTML="x<style>"+b+"</style>";return m.insertBefore(c.lastChild,m.firstChild)}function o(){var a=d.elements;return"string"==typeof a?a.split(" "):a}function n(a){var b=t[a[u]];b||(b={},p++,a[u]=p,t[p]=b);return b}function v(a,b,c){b||(b=f);if(e)return b.createElement(a);c||(c=n(b));b=c.cache[a]?c.cache[a].cloneNode():y.test(a)?(c.cache[a]=c.createElem(a)).cloneNode():c.createElem(a);
+return b.canHaveChildren&&!z.test(a)?c.frag.appendChild(b):b}function A(a,b){if(!b.cache)b.cache={},b.createElem=a.createElement,b.createFrag=a.createDocumentFragment,b.frag=b.createFrag();a.createElement=function(c){return!d.shivMethods?b.createElem(c):v(c,a,b)};a.createDocumentFragment=Function("h,f","return function(){var n=f.cloneNode(),c=n.createElement;h.shivMethods&&("+o().join().replace(/\w+/g,function(a){b.createElem(a);b.frag.createElement(a);return'c("'+a+'")'})+");return n}")(d,b.frag)}
+function w(a){a||(a=f);var b=n(a);if(d.shivCSS&&!q&&!b.hasCSS)b.hasCSS=!!s(a,"article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}mark{background:#FF0;color:#000}template{display:none}");e||A(a,b);return a}function B(a){for(var b,c=a.attributes,m=c.length,f=a.ownerDocument.createElement(l+":"+a.nodeName);m--;)b=c[m],b.specified&&f.setAttribute(b.nodeName,b.nodeValue);f.style.cssText=a.style.cssText;return f}function x(a){function b(){clearTimeout(d._removeSheetTimer);
+c&&c.removeNode(!0);c=null}var c,f,d=n(a),e=a.namespaces,j=a.parentWindow;if(!C||a.printShived)return a;"undefined"==typeof e[l]&&e.add(l);j.attachEvent("onbeforeprint",function(){b();var g,i,d;d=a.styleSheets;for(var e=[],h=d.length,k=Array(h);h--;)k[h]=d[h];for(;d=k.pop();)if(!d.disabled&&D.test(d.media)){try{g=d.imports,i=g.length}catch(j){i=0}for(h=0;h<i;h++)k.push(g[h]);try{e.push(d.cssText)}catch(n){}}g=e.reverse().join("").split("{");i=g.length;h=RegExp("(^|[\\s,>+~])("+o().join("|")+")(?=[[\\s,>+~#.:]|$)",
+"gi");for(k="$1"+l+"\\:$2";i--;)e=g[i]=g[i].split("}"),e[e.length-1]=e[e.length-1].replace(h,k),g[i]=e.join("}");e=g.join("{");i=a.getElementsByTagName("*");h=i.length;k=RegExp("^(?:"+o().join("|")+")$","i");for(d=[];h--;)g=i[h],k.test(g.nodeName)&&d.push(g.applyElement(B(g)));f=d;c=s(a,e)});j.attachEvent("onafterprint",function(){for(var a=f,c=a.length;c--;)a[c].removeNode();clearTimeout(d._removeSheetTimer);d._removeSheetTimer=setTimeout(b,500)});a.printShived=!0;return a}var r=j.html5||{},z=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,
+y=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,q,u="_html5shiv",p=0,t={},e;(function(){try{var a=f.createElement("a");a.innerHTML="<xyz></xyz>";q="hidden"in a;var b;if(!(b=1==a.childNodes.length)){f.createElement("a");var c=f.createDocumentFragment();b="undefined"==typeof c.cloneNode||"undefined"==typeof c.createDocumentFragment||"undefined"==typeof c.createElement}e=b}catch(d){e=q=!0}})();var d={elements:r.elements||"abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output progress section summary template time video",
+version:"3.7.0",shivCSS:!1!==r.shivCSS,supportsUnknownElements:e,shivMethods:!1!==r.shivMethods,type:"default",shivDocument:w,createElement:v,createDocumentFragment:function(a,b){a||(a=f);if(e)return a.createDocumentFragment();for(var b=b||n(a),c=b.frag.cloneNode(),d=0,j=o(),l=j.length;d<l;d++)c.createElement(j[d]);return c}};j.html5=d;w(f);var D=/^$|\b(?:all|print)\b/,l="html5shiv",C=!e&&function(){var a=f.documentElement;return!("undefined"==typeof f.namespaces||"undefined"==typeof f.parentWindow||
+"undefined"==typeof a.applyElement||"undefined"==typeof a.removeNode||"undefined"==typeof j.attachEvent)}();d.type+=" print";d.shivPrint=x;x(f)})(this,document);