diff --git a/wp-content/themes/twentythirteen/comments.php b/wp-content/themes/twentythirteen/comments.php
index 85b2afc1c5..d55711831b 100644
--- a/wp-content/themes/twentythirteen/comments.php
+++ b/wp-content/themes/twentythirteen/comments.php
@@ -30,7 +30,14 @@ if ( post_password_required() )
 		</h2>
 
 		<ol class="comment-list">
-			<?php wp_list_comments( array( 'callback' => 'twentythirteen_comment', 'style' => 'ol' ) ); ?>
+			<?php
+				wp_list_comments( array(
+					'style'       => 'ol',
+					'format'      => 'html5',
+					'short_ping'  => true,
+					'avatar_size' => 74,
+				) );
+			?>
 		</ol><!-- .comment-list -->
 
 		<?php
diff --git a/wp-content/themes/twentythirteen/functions.php b/wp-content/themes/twentythirteen/functions.php
index 801866147b..f34068593e 100644
--- a/wp-content/themes/twentythirteen/functions.php
+++ b/wp-content/themes/twentythirteen/functions.php
@@ -351,74 +351,6 @@ function twentythirteen_post_nav() {
 }
 endif;
 
-if ( ! function_exists( 'twentythirteen_comment' ) ) :
-/**
- * Template for comments and pingbacks.
- *
- * To override this walker in a child theme without modifying the comments
- * template simply create your own twentythirteen_comment(), and that function
- * will be used instead.
- *
- * Used as a callback by wp_list_comments() for displaying the comments.
- *
- * @since Twenty Thirteen 1.0
- *
- * @param object $comment Comment to display.
- * @param array $args Optional args.
- * @param int $depth Depth of comment.
- * @return void
- */
-
-function twentythirteen_comment( $comment, $args, $depth ) {
-	$GLOBALS['comment'] = $comment;
-	switch ( $comment->comment_type ) :
-		case 'pingback' :
-		case 'trackback' :
-		// Display trackbacks differently than normal comments.
-	?>
-	<li id="comment-<?php comment_ID(); ?>" <?php comment_class(); ?>>
-		<p><?php _e( 'Pingback:', 'twentythirteen' ); ?> <?php comment_author_link(); ?> <?php edit_comment_link( __( 'Edit', 'twentythirteen' ), '<span class="ping-meta"><span class="edit-link">', '</span></span>' ); ?></p>
-	<?php
-			break;
-		default :
-		// Proceed with normal comments.
-	?>
-	<li id="li-comment-<?php comment_ID(); ?>">
-		<article id="comment-<?php comment_ID(); ?>" <?php comment_class(); ?>>
-			<div class="comment-author vcard">
-				<?php echo get_avatar( $comment, 74 ); ?>
-				<cite class="fn"><?php comment_author_link(); ?></cite>
-			</div><!-- .comment-author -->
-
-			<header class="comment-meta">
-				<?php
-					printf( '<a href="%1$s"><time datetime="%2$s">%3$s</time></a>',
-						esc_url( get_comment_link( $comment->comment_ID ) ),
-						get_comment_time( 'c' ),
-						sprintf( _x( '%1$s at %2$s', '1: date, 2: time', 'twentythirteen' ), get_comment_date(), get_comment_time() )
-					);
-					edit_comment_link( __( 'Edit', 'twentythirteen' ), '<span class="edit-link">', '</span>' );
-				?>
-			</header><!-- .comment-meta -->
-
-			<?php if ( '0' == $comment->comment_approved ) : ?>
-				<p class="comment-awaiting-moderation"><?php _e( 'Your comment is awaiting moderation.', 'twentythirteen' ); ?></p>
-			<?php endif; ?>
-
-			<div class="comment-content">
-				<?php comment_text(); ?>
-			</div><!-- .comment-content -->
-
-			<div class="reply">
-				<?php comment_reply_link( array_merge( $args, array( 'reply_text' => __( 'Reply', 'twentythirteen' ), 'depth' => $depth, 'max_depth' => $args['max_depth'] ) ) ); ?>
-			</div><!-- .reply -->
-		</article><!-- #comment-## -->
-	<?php
-		break;
-	endswitch; // End comment_type check.
-}
-endif;
-
 if ( ! function_exists( 'twentythirteen_entry_meta' ) ) :
 /**
  * Prints HTML with meta information for current post: categories, tags, permalink, author, and date.
diff --git a/wp-content/themes/twentythirteen/rtl.css b/wp-content/themes/twentythirteen/rtl.css
index de6ca8dcf4..1f5fb8b76f 100644
--- a/wp-content/themes/twentythirteen/rtl.css
+++ b/wp-content/themes/twentythirteen/rtl.css
@@ -591,9 +591,10 @@ div.nav-menu > ul {
 }
 
 .comment-author {
-	float: right;
 	margin-left: 50px;
 	margin-right: auto;
+	left: auto;
+	right: 0;
 }
 
 
diff --git a/wp-content/themes/twentythirteen/style.css b/wp-content/themes/twentythirteen/style.css
index 0b3b94e29b..75ee03527e 100644
--- a/wp-content/themes/twentythirteen/style.css
+++ b/wp-content/themes/twentythirteen/style.css
@@ -510,7 +510,7 @@ hr {
 .navigation:after,
 .nav-links:after,
 .gallery:after,
-.comment:after {
+.comment-body:after {
 	clear: both;
 }
 
@@ -530,8 +530,8 @@ hr {
 .nav-links:after,
 .gallery:before,
 .gallery:after,
-.comment:before,
-.comment:after {
+.comment-body:before,
+.comment-body:after {
 	content: "";
 	display: table;
 }
@@ -2258,14 +2258,15 @@ footer.entry-meta {
 	display: none;
 }
 
-.comment {
+.comment-body {
 	padding: 24px 0;
+	position: relative;
 }
 
 .comment-author {
-	float: left;
-	margin-right: 50px;
 	max-width: 74px;
+	position: absolute;
+	left: 0;
 }
 
 .comment-author .avatar {
@@ -2274,16 +2275,21 @@ footer.entry-meta {
 }
 
 .comment-author .fn,
+.comment-author .url,
 .comment-reply-link {
 	color: #ed331c;
 	font-size: 14px;
 	font-style: normal;
 }
 
+.says {
+	display: none;
+}
+
 .no-avatars .comment-author {
-	float: none;
 	margin: 0 0 5px;
 	max-width: 100%;
+	position: relative;
 }
 
 .no-avatars .comment-meta,
@@ -2329,6 +2335,7 @@ footer.entry-meta {
 
 .comment-awaiting-moderation {
 	color: #a2a2a2;
+	margin: 20px 0 0;
 }
 
 .comment-awaiting-moderation:before {
@@ -2349,8 +2356,8 @@ footer.entry-meta {
 	padding: 30px 0;
 }
 
-.comment + #respond {
-	margin-bottom: 30px;
+.comment #respond {
+	margin-bottom: 20px;
 	padding: 20px;
 }
 
@@ -3117,9 +3124,9 @@ footer.entry-meta {
 
 	/* Comments */
 	.comment-author {
-		float: none;
 		margin: 0 0 5px;
 		max-width: 100%;
+		position: relative;
 	}
 
 	.comment-author .avatar {