diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index e6a9ef1e06..96ecd1dacd 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -471,7 +471,7 @@ function wp_default_scripts( &$scripts ) {
 	$scripts->add( 'jsonlint', '/wp-includes/js/codemirror/jsonlint.js', array(), '1.6.2' );
 	$scripts->add( 'htmlhint', '/wp-includes/js/codemirror/htmlhint.js', array(), '0.9.14-xwp' );
 	$scripts->add( 'htmlhint-kses', '/wp-includes/js/codemirror/htmlhint-kses.js', array( 'htmlhint' ) );
-	$scripts->add( 'code-editor', "/wp-admin/js/code-editor$suffix.js", array( 'jquery', 'wp-codemirror' ) );
+	$scripts->add( 'code-editor', "/wp-admin/js/code-editor$suffix.js", array( 'jquery', 'wp-codemirror', 'underscore' ) );
 	$scripts->add( 'wp-theme-plugin-editor', "/wp-admin/js/theme-plugin-editor$suffix.js", array( 'wp-util', 'wp-sanitize', 'jquery', 'jquery-ui-core', 'wp-a11y', 'underscore' ) );
 	did_action( 'init' ) && $scripts->add_inline_script( 'wp-theme-plugin-editor', sprintf( 'wp.themePluginEditor.l10n = %s;', wp_json_encode( array(
 		'saveAlert' => __( 'The changes you made will be lost if you navigate away from this page.' ),
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 62d3b34f1b..c4d3c64f84 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-beta3-41976';
+$wp_version = '4.9-beta3-41977';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.