diff --git a/index.php b/index.php
index 451dbef39ab2b..a018a805072ee 100644
--- a/index.php
+++ b/index.php
@@ -6,5 +6,9 @@
  */
 
 _deprecated_file( __FILE__, '0.1.0' );
+
+require_once ABSPATH . 'wp-admin/includes/plugin.php';
 deactivate_plugins( array( 'gutenberg/index.php' ) );
 activate_plugins( array( 'gutenberg/gutenberg.php' ) );
+
+require_once dirname( __FILE__ ) . '/gutenberg.php';