diff --git a/Mage/Command/BuiltIn/UpgradeCommand.php b/Mage/Command/BuiltIn/UpgradeCommand.php
index dbf5328..cece5bb 100644
--- a/Mage/Command/BuiltIn/UpgradeCommand.php
+++ b/Mage/Command/BuiltIn/UpgradeCommand.php
@@ -20,7 +20,7 @@ use Exception;
  *
  * @author Andrés Montañez <andres@andresmontanez.com>
  */
-class UpgradeCommand extends InstallCommand
+class UpgradeCommand extends AbstractCommand
 {
 	/**
 	 * Source for downloading