diff --git a/src/wp-content/themes/twentythirteen/functions.php b/src/wp-content/themes/twentythirteen/functions.php
index 043be440a1..b21b24000e 100644
--- a/src/wp-content/themes/twentythirteen/functions.php
+++ b/src/wp-content/themes/twentythirteen/functions.php
@@ -547,6 +547,6 @@ add_action( 'customize_register', 'twentythirteen_customize_register' );
  * @since Twenty Thirteen 1.0
  */
 function twentythirteen_customize_preview_js() {
-	wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130226', true );
+	wp_enqueue_script( 'twentythirteen-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20141120', true );
 }
 add_action( 'customize_preview_init', 'twentythirteen_customize_preview_js' );
diff --git a/src/wp-content/themes/twentythirteen/js/theme-customizer.js b/src/wp-content/themes/twentythirteen/js/theme-customizer.js
index 0123d3a843..60721045cd 100644
--- a/src/wp-content/themes/twentythirteen/js/theme-customizer.js
+++ b/src/wp-content/themes/twentythirteen/js/theme-customizer.js
@@ -21,8 +21,9 @@
 	wp.customize( 'header_textcolor', function( value ) {
 		value.bind( function( to ) {
 			if ( 'blank' == to ) {
-				if ( 'remove-header' == _wpCustomizeSettings.values.header_image )
+				if ( 'remove-header' == wp.customize.instance( 'header_image' ).get() ) {
 					$( '.home-link' ).css( 'min-height', '0' );
+				}
 				$( '.site-title, .site-description' ).css( {
 					'clip': 'rect(1px, 1px, 1px, 1px)',
 					'position': 'absolute'
diff --git a/src/wp-content/themes/twentytwelve/functions.php b/src/wp-content/themes/twentytwelve/functions.php
index 38ea36ec74..0b6e180b2b 100644
--- a/src/wp-content/themes/twentytwelve/functions.php
+++ b/src/wp-content/themes/twentytwelve/functions.php
@@ -494,6 +494,6 @@ add_action( 'customize_register', 'twentytwelve_customize_register' );
  * @since Twenty Twelve 1.0
  */
 function twentytwelve_customize_preview_js() {
-	wp_enqueue_script( 'twentytwelve-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20130301', true );
+	wp_enqueue_script( 'twentytwelve-customizer', get_template_directory_uri() . '/js/theme-customizer.js', array( 'customize-preview' ), '20141120', true );
 }
 add_action( 'customize_preview_init', 'twentytwelve_customize_preview_js' );
diff --git a/src/wp-content/themes/twentytwelve/js/theme-customizer.js b/src/wp-content/themes/twentytwelve/js/theme-customizer.js
index 9dc117f6c3..8bf094be54 100644
--- a/src/wp-content/themes/twentytwelve/js/theme-customizer.js
+++ b/src/wp-content/themes/twentytwelve/js/theme-customizer.js
@@ -53,12 +53,13 @@
 		value.bind( function( to ) {
 			var body = $( 'body' );
 
-			if ( '' != to )
+			if ( '' !== to ) {
 				body.removeClass( 'custom-background-empty custom-background-white' );
-			else if ( 'rgb(255, 255, 255)' == body.css( 'background-color' ) )
+			} else if ( 'rgb(255, 255, 255)' === body.css( 'background-color' ) ) {
 				body.addClass( 'custom-background-white' );
-			else if ( 'rgb(230, 230, 230)' == body.css( 'background-color' ) && '' == _wpCustomizeSettings.values.background_color )
+			} else if ( 'rgb(230, 230, 230)' === body.css( 'background-color' ) && '' === wp.customize.instance( 'background_color' ).get() ) {
 				body.addClass( 'custom-background-empty' );
+			}
 		} );
 	} );
 } )( jQuery );