diff --git a/scripts/wp-liveticker2.js b/scripts/wp-liveticker2.js
index dc7b8c2..99e65d9 100644
--- a/scripts/wp-liveticker2.js
+++ b/scripts/wp-liveticker2.js
@@ -4,93 +4,136 @@ function WPLT2() {
 
 /**
  * Initialize WP-Liveticker 2 JS component.
+ *
+ * @return void
  */
 WPLT2.init = function () {
-	// Get ticker elements
-	WPLT2.ticker = jQuery("ul.wplt2-ticker-ajax").map(function () {
-		return {s: jQuery(this).data('wplt2Ticker'), e: this};
-	});
-	WPLT2.widgets = jQuery("ul.wplt2-widget-ajax").map(function () {
-		return {s: jQuery(this).data('wplt2Ticker'), e: this};
-	});
+	// Get ticker elements.
+	WPLT2.ticker = [].map.call(
+		document.querySelectorAll( 'ul.wplt2-ticker-ajax' ),
+		function( elem ) {
+			return {
+				s: elem.getAttribute( 'data-wplt2-ticker' ),
+				l: elem.getAttribute( 'data-wplt2-limit' ),
+				t: elem.getAttribute( 'data-wplt2-last' ),
+				e: elem
+			};
+		}
+	);
+
+	// Get widget elements.
+	WPLT2.widgets = [].map.call(
+		document.querySelectorAll( 'ul.wplt2-widget-ajax' ),
+		function( elem ) {
+			return {
+				w: elem.getAttribute( 'data-wplt2-ticker' ),
+				l: elem.getAttribute( 'data-wplt2-limit' ),
+				t: elem.getAttribute( 'data-wplt2-last' ),
+				e: elem
+			};
+		}
+	);
+
 	// Extract AJAX settings.
 	WPLT2.ajaxURL = ajax_object.ajax_url;
 	WPLT2.nonce = ajax_object.nonce;
 	WPLT2.pollInterval = ajax_object.poll_interval;
+
 	// Trigger update, if necessary.
-	if ((WPLT2.ticker.length > 0 || WPLT2.widgets.length) && WPLT2.pollInterval > 0) {
-		setTimeout(WPLT2.update, WPLT2.pollInterval);
+	if ( ( WPLT2.ticker.length > 0 || WPLT2.widgets.length ) && WPLT2.pollInterval > 0 ) {
+		setTimeout( WPLT2.update, WPLT2.pollInterval );
 	}
 };
 
 /**
  * Update liveticker on current page via AJAX call.
+ *
+ * @return void
  */
 WPLT2.update = function () {
 	// Extract ticker-slug, limit and timestamp of last poll.
-	const updateReq = jQuery.merge(
-		jQuery.map(WPLT2.ticker, function (e, i) {
-			return {s: e.s, l: jQuery(e.e).data('wplt2Limit'), t: jQuery(e.e).data('wplt2Last')};
-		}),
-		jQuery.map(WPLT2.widgets, function (e, i) {
-			return {w: e.s, l: jQuery(e.e).data('wplt2Limit'), t: jQuery(e.e).data('wplt2Last')};
-		})
-	);
+	var updateReq = 'action=wplt2_update-ticks&_ajax_nonce=' + WPLT2.nonce;
+	var i;
+	var j;
+
+	for ( i = 0; i < WPLT2.ticker.length; i++ ) {
+		updateReq = updateReq +
+			'&update[' + i + '][s]=' + WPLT2.ticker[ i ].s +
+			'&update[' + i + '][l]=' + WPLT2.ticker[ i ].l +
+			'&update[' + i + '][t]=' + WPLT2.ticker[ i ].t;
+	}
+	for ( j = 0; j < WPLT2.widgets.length; j++ ) {
+		updateReq = updateReq +
+			'&update[' + ( i + j ) + '][w]=' + WPLT2.widgets[ j ].w +
+			'&update[' + ( i + j ) + '][l]=' + WPLT2.widgets[ j ].l +
+			'&update[' + ( i + j ) + '][t]=' + WPLT2.widgets[ j ].t;
+	}
 
 	// Issue AJAX request.
-	jQuery.post(
-		WPLT2.ajaxURL,
-		{
-			'action'     : 'wplt2_update-ticks',
-			'_ajax_nonce': WPLT2.nonce,
-			'update'     : updateReq
-		},
-		function (res) {
+	var xhr = new XMLHttpRequest();
+	xhr.open( 'POST', WPLT2.ajaxURL, true );
+	xhr.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded;' );
+	xhr.onreadystatechange = function() {
+		if( XMLHttpRequest.DONE === this.readyState && 200 === this.status ) {
 			try {
-				const update = JSON.parse(res);
-				if (update) {
-					jQuery.each(update, function (i, u) {
-						jQuery.each(WPLT2.ticker, function (j, t) {
-							if (t.s === u.s) {
-								WPLT2.updateHTML(t.e, u.h, u.t);
-							}
-						});
-						jQuery.each(WPLT2.widgets, function (j, t) {
-							if (t.s === u.w) {
-								WPLT2.updateHTML(t.e, u.h, u.t);
-							}
-						});
-					});
+				var update = JSON.parse( this.responseText );
+				if ( update ) {
+					update.forEach(
+						function( u ) {
+							WPLT2.ticker.forEach(
+								function( t ) {
+									if ( t.s === u.s ) {
+										// Update last poll timestamp.
+										t.t = u.t;
+										// Update HTML markup.
+										WPLT2.updateHTML( t, u );
+									}
+								}
+							);
+							WPLT2.widgets.forEach( function ( t ) {
+								if ( t.w === u.w ) {
+									t.t = u.t;
+									WPLT2.updateHTML( t, u );
+								}
+							} );
+						}
+					);
 				}
 				// Re-trigger update.
-				setTimeout(WPLT2.update, WPLT2.pollInterval);
-			} catch (e) {
-				console.warn('WP-Liveticker 2 AJAX update failed, stopping automatic updates.')
+				setTimeout( WPLT2.update, WPLT2.pollInterval );
+			} catch ( e ) {
+				console.warn( 'WP-Liveticker 2 AJAX update failed, stopping automatic updates.' )
 			}
 		}
-	);
+	};
+	xhr.send( updateReq );
 };
 
 /**
  * Do actual update of HTML code.
  *
- * @param e The element.
- * @param h The new HTML code.
- * @param t Timestamp of update.
+ * @param t Ticker or Widget reference.
+ * @param u Update entity.
+ * @return void
  */
-WPLT2.updateHTML = function(e, h, t) {
+WPLT2.updateHTML = function( t, u ) {
 	// Prepend HTML of new ticks.
-	jQuery(e).prepend(h);
+	t.e.innerHTML = u.h + t.e.innerHTML;
+	t.e.setAttribute( 'data-wplt2-last', u.t );
 	// Remove tail, if limit is set.
-	const l = jQuery(e).data('wplt2Limit');
-	if (l > 0) {
-		jQuery(e).find('li').slice(l).remove();
+	if ( t.l > 0 ) {
+		[].slice.call( t.e.getElementsByTagName( 'li' ), t.l ).forEach(
+			function( li ) {
+				li.remove();
+			}
+		);
 	}
-	// Update last poll timestamp.
-	jQuery(e).data('wplt2Last', t);
 };
 
-jQuery(document).ready(function ($) {
-	// Trigger periodic update of livetickers.
-	WPLT2.init();
-});
+document.addEventListener(
+	'DOMContentLoaded',
+	function() {
+		// Trigger periodic update of livetickers.
+		WPLT2.init();
+	}
+);