diff --git a/wp-includes/js/thickbox/thickbox.js b/wp-includes/js/thickbox/thickbox.js
index fdd3bb991c..55c66caaf3 100644
--- a/wp-includes/js/thickbox/thickbox.js
+++ b/wp-includes/js/thickbox/thickbox.js
@@ -35,7 +35,7 @@ function tb_click(){
 	var a = this.href || this.alt;
 	var g = this.rel || false;
 	tb_show(t,a,g);
-	this.trigger( 'blur' );
+	this.blur();
 	return false;
 }
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c9c827bdea..e1cb4a9cf6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.7-beta3-50382';
+$wp_version = '5.7-beta3-50383';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.