diff --git a/wp-activate.php b/wp-activate.php
index 78feda6a10..dc3a0d42f5 100644
--- a/wp-activate.php
+++ b/wp-activate.php
@@ -18,6 +18,8 @@ if ( ! is_multisite() ) {
 	die();
 }
 
+nocache_headers();
+
 if ( is_object( $wp_object_cache ) ) {
 	$wp_object_cache->cache_enabled = false;
 }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ae42ad043d..20e20fd70d 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43063';
+$wp_version = '5.0-alpha-43065';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.