diff --git a/upgrade.php b/upgrade.php
new file mode 100644
index 0000000..754668f
--- /dev/null
+++ b/upgrade.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Garradin;
+
+use Garradin\Entities\Files\File;
+
+if (version_compare($old_version, '0.9', '<'))
+{
+    $configNum = new \stdClass();
+    $configNum->prefixe = "";
+    $configNum->annee = false;
+    $configNum->membre = false;
+    $configNum->sequentiel = false;
+    $configNum->valeur_init = 1;
+    $plugin->setConfig('numerotation', $configNum);
+    $plugin->setConfig('imprimerCourriel', false);
+}
diff --git a/www/admin/index.php b/www/admin/index.php
index 4c5e0f3..9125c0c 100644
--- a/www/admin/index.php
+++ b/www/admin/index.php
@@ -4,6 +4,11 @@ namespace Garradin;
 
 use Garradin\Plugin\RecusFiscaux\Utils;
 
+// mettre à jour le plugin si besoin
+if ($plugin->needUpgrade()) {
+	$plugin->upgrade();
+}
+
 // Année fiscale par défaut
 if (! isset($_SESSION['annee_recu']) || $_SESSION['annee_recu'] == "")
 {