diff --git a/System/Event.php b/System/Event.php
index 8ea64d25..73a6325a 100644
--- a/System/Event.php
+++ b/System/Event.php
@@ -52,6 +52,8 @@ class Event extends BaseObject
     const SERVER_WORKER_START = 'SERVER:EVENT:WORKER:START';
     const SERVER_AFTER_WORKER_START = 'SERVER:EVENT:AFTER:WORKER:START';
     const SERVER_BEFORE_START = 'SERVER:EVENT:BEFORE:START';
+    const BEFORE_COMMAND_EXECUTE = 'COMMAND:EVENT:BEFORE:EXECUTE';
+    const AFTER_COMMAND_EXECUTE = 'COMMAND:EVENT:AFTER:EXECUTE';
     const SERVER_TASK_START = 'SERVER:EVENT:TASK:START';
     const SERVER_WORKER_EXIT = 'SERVER:EVENT:WORKER:EXIT';
     const SERVER_WORKER_ERROR = 'SERVER:EVENT:WORKER:ERROR';