diff --git a/extension.php b/extension.php
index 51b973747a..e8f7d9cae3 100644
--- a/extension.php
+++ b/extension.php
@@ -27,6 +27,10 @@
  * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
  ************************************************************************/
 
+/**
+ * @deprecated Use `php command.php extension --file="path/to/extension/package.zip"`.
+ */
+
 if (substr(php_sapi_name(), 0, 3) !== 'cli') {
     exit;
 }
diff --git a/upgrade.php b/upgrade.php
index 6e95a7ced3..3f32a24f0f 100644
--- a/upgrade.php
+++ b/upgrade.php
@@ -27,6 +27,10 @@
  * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
  ************************************************************************/
 
+/**
+ * @deprecated Use `php command.php upgrade`.
+ */
+
 if (substr(php_sapi_name(), 0, 3) !== 'cli') {
     exit;
 }