diff --git a/wp-content/themes/twentynineteen/404.php b/wp-content/themes/twentynineteen/404.php
index 1067ab0300..23ae5e71cf 100644
--- a/wp-content/themes/twentynineteen/404.php
+++ b/wp-content/themes/twentynineteen/404.php
@@ -12,7 +12,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 			<div class="error-404 not-found">
@@ -27,7 +27,7 @@ get_header();
 			</div><!-- .error-404 -->
 
 		</main><!-- #main -->
-	</section><!-- #primary -->
+	</div><!-- #primary -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/archive.php b/wp-content/themes/twentynineteen/archive.php
index 88703de75a..423db00ffd 100644
--- a/wp-content/themes/twentynineteen/archive.php
+++ b/wp-content/themes/twentynineteen/archive.php
@@ -12,7 +12,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 		<?php if ( have_posts() ) : ?>
@@ -48,7 +48,7 @@ get_header();
 		endif;
 		?>
 		</main><!-- #main -->
-	</section><!-- #primary -->
+	</div><!-- #primary -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/image.php b/wp-content/themes/twentynineteen/image.php
index 000983ce74..5e08cf9487 100644
--- a/wp-content/themes/twentynineteen/image.php
+++ b/wp-content/themes/twentynineteen/image.php
@@ -10,7 +10,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 			<?php
@@ -98,7 +98,7 @@ get_header();
 			?>
 
 		</main><!-- .site-main -->
-	</section><!-- .content-area -->
+	</div><!-- .content-area -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/index.php b/wp-content/themes/twentynineteen/index.php
index 480be7ef15..2c176b82fe 100644
--- a/wp-content/themes/twentynineteen/index.php
+++ b/wp-content/themes/twentynineteen/index.php
@@ -17,7 +17,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 		<?php
@@ -41,7 +41,7 @@ get_header();
 		?>
 
 		</main><!-- .site-main -->
-	</section><!-- .content-area -->
+	</div><!-- .content-area -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/page.php b/wp-content/themes/twentynineteen/page.php
index 9b1540685a..717b0417fc 100644
--- a/wp-content/themes/twentynineteen/page.php
+++ b/wp-content/themes/twentynineteen/page.php
@@ -12,7 +12,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 			<?php
@@ -32,7 +32,7 @@ get_header();
 			?>
 
 		</main><!-- #main -->
-	</section><!-- #primary -->
+	</div><!-- #primary -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/search.php b/wp-content/themes/twentynineteen/search.php
index fc00c52820..0191775041 100644
--- a/wp-content/themes/twentynineteen/search.php
+++ b/wp-content/themes/twentynineteen/search.php
@@ -12,7 +12,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 		<?php if ( have_posts() ) : ?>
@@ -49,7 +49,7 @@ get_header();
 		endif;
 		?>
 		</main><!-- #main -->
-	</section><!-- #primary -->
+	</div><!-- #primary -->
 
 <?php
 get_footer();
diff --git a/wp-content/themes/twentynineteen/single.php b/wp-content/themes/twentynineteen/single.php
index f31048c78c..b8cf0b16b0 100644
--- a/wp-content/themes/twentynineteen/single.php
+++ b/wp-content/themes/twentynineteen/single.php
@@ -12,7 +12,7 @@
 get_header();
 ?>
 
-	<section id="primary" class="content-area">
+	<div id="primary" class="content-area">
 		<main id="main" class="site-main">
 
 			<?php
@@ -54,7 +54,7 @@ get_header();
 			?>
 
 		</main><!-- #main -->
-	</section><!-- #primary -->
+	</div><!-- #primary -->
 
 <?php
 get_footer();
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0413fe866f..bf90a775f5 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-45936';
+$wp_version = '5.3-alpha-45942';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.