diff --git a/src/Core_Command.php b/src/Core_Command.php
index 5bee2550..6f7add86 100644
--- a/src/Core_Command.php
+++ b/src/Core_Command.php
@@ -1316,7 +1316,7 @@ public function update_db( $args, $assoc_args ) {
 
 					// WP upgrade expects `$_SERVER['HTTP_HOST']` to be set in `wp_guess_url()`, otherwise get PHP notice.
 					if ( ! isset( $_SERVER['HTTP_HOST'] ) ) {
-						$_SERVER['HTTP_HOST'] = 'http://example.com';
+						$_SERVER['HTTP_HOST'] = 'example.com';
 					}
 
 					wp_upgrade();