diff --git a/Civi/Api4/Action/ContactCategory/Sync.php b/Civi/Api4/Action/ContactCategory/Sync.php
index 4747824..20c2c41 100644
--- a/Civi/Api4/Action/ContactCategory/Sync.php
+++ b/Civi/Api4/Action/ContactCategory/Sync.php
@@ -18,7 +18,7 @@ use CRM_Core_DAO;
 class Sync extends \Civi\Api4\Generic\AbstractAction {
 
   public function _run(Result $result) {
-    ini_set('memory_limit', '512M');
+    ini_set('memory_limit', '256M');
     Civi::log()->debug('Begin', ['=start' => 'ContactCatSync', '=timed' => 1]);
     $settings = Civi::settings()->get('contact_categories');
     $settings = Setting::get(FALSE)