diff --git a/wp-content/themes/twentyeleven/functions.php b/wp-content/themes/twentyeleven/functions.php
index cc8f2ca464..069f19bf5d 100644
--- a/wp-content/themes/twentyeleven/functions.php
+++ b/wp-content/themes/twentyeleven/functions.php
@@ -88,6 +88,9 @@ function twentyeleven_setup() {
 	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-content/themes/twentyfifteen/functions.php b/wp-content/themes/twentyfifteen/functions.php
index 5f953e9d0a..1acb26c3ee 100644
--- a/wp-content/themes/twentyfifteen/functions.php
+++ b/wp-content/themes/twentyfifteen/functions.php
@@ -148,6 +148,9 @@ function twentyfifteen_setup() {
 	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-content/themes/twentyfourteen/functions.php b/wp-content/themes/twentyfourteen/functions.php
index cb6a488690..d147558e9d 100644
--- a/wp-content/themes/twentyfourteen/functions.php
+++ b/wp-content/themes/twentyfourteen/functions.php
@@ -76,6 +76,9 @@ function twentyfourteen_setup() {
 	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-content/themes/twentyseventeen/functions.php b/wp-content/themes/twentyseventeen/functions.php
index e4282e5fd3..524e4e43f5 100644
--- a/wp-content/themes/twentyseventeen/functions.php
+++ b/wp-content/themes/twentyseventeen/functions.php
@@ -112,6 +112,9 @@ function twentyseventeen_setup() {
  	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Define and register starter content to showcase the theme on new sites.
 	$starter_content = array(
 		'widgets' => array(
diff --git a/wp-content/themes/twentysixteen/functions.php b/wp-content/themes/twentysixteen/functions.php
index f5e7e950a2..ef8ef088db 100644
--- a/wp-content/themes/twentysixteen/functions.php
+++ b/wp-content/themes/twentysixteen/functions.php
@@ -130,6 +130,9 @@ function twentysixteen_setup() {
 	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-content/themes/twentythirteen/functions.php b/wp-content/themes/twentythirteen/functions.php
index f86c3f788c..e52bbb67bb 100644
--- a/wp-content/themes/twentythirteen/functions.php
+++ b/wp-content/themes/twentythirteen/functions.php
@@ -83,6 +83,9 @@ function twentythirteen_setup() {
 	// Add support for full and wide align images.
 	add_theme_support( 'align-wide' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-content/themes/twentytwelve/functions.php b/wp-content/themes/twentytwelve/functions.php
index 51c26754d3..8df145ab82 100644
--- a/wp-content/themes/twentytwelve/functions.php
+++ b/wp-content/themes/twentytwelve/functions.php
@@ -60,6 +60,9 @@ function twentytwelve_setup() {
 	// Load default block styles.
 	add_theme_support( 'wp-block-styles' );
 
+	// Add support for responsive embeds.
+	add_theme_support( 'responsive-embeds' );
+
 	// Add support for custom color scheme.
 	add_theme_support( 'editor-color-palette', array(
 		array(
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6e7853fc2a..1837dbe6cc 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-beta3-43867';
+$wp_version = '5.0-beta3-43868';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.