diff --git a/machine_factory.php b/machine_factory.php
index 44545e2..7ec5696 100644
--- a/machine_factory.php
+++ b/machine_factory.php
@@ -27,7 +27,6 @@
     list($os_version, $build) = $faker->randomElement($oses);
 
     return [
-        'serial_number' => 'override',
         'hostname' => $computerName . '.local',
         'machine_model' => $machine_model,
         'machine_desc' => $machine_desc,