diff --git a/upgrade.php b/upgrade.php
index 754668f..de36e6c 100644
--- a/upgrade.php
+++ b/upgrade.php
@@ -4,6 +4,8 @@ namespace Garradin;
 
 use Garradin\Entities\Files\File;
 
+$old_version = $plugin->getInfos('version');
+
 if (version_compare($old_version, '0.9', '<'))
 {
     $configNum = new \stdClass();