diff --git a/wp-includes/rest-api/class-wp-rest-server.php b/wp-includes/rest-api/class-wp-rest-server.php
index 1b1a24439b..1a43a1ac32 100644
--- a/wp-includes/rest-api/class-wp-rest-server.php
+++ b/wp-includes/rest-api/class-wp-rest-server.php
@@ -240,7 +240,7 @@ class WP_REST_Server {
 		 */
 		$this->send_header( 'X-Content-Type-Options', 'nosniff' );
 		$this->send_header( 'Access-Control-Expose-Headers', 'X-WP-Total, X-WP-TotalPages' );
-		$this->send_header( 'Access-Control-Allow-Headers', 'Authorization' );
+		$this->send_header( 'Access-Control-Allow-Headers', 'Authorization, Content-Type' );
 
 		/**
 		 * Send nocache headers on authenticated requests.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b43468cb91..7e85c37cd9 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39043';
+$wp_version = '4.7-beta1-39044';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.