diff --git a/Config/module.xml b/Config/module.xml
index e5506f6..e010761 100644
--- a/Config/module.xml
+++ b/Config/module.xml
@@ -7,7 +7,7 @@
     <descriptive locale="fr_FR">
         <title>Paiement en carte bancaire avec Paybox</title>
     </descriptive>
-    <version>1.2.3</version>
+    <version>1.2.4</version>
     <author>
         <name>Franck Allimant</name>
         <email>franck@cqfdev.fr</email>
diff --git a/Paybox.php b/Paybox.php
index 9e4c4be..3810ad2 100644
--- a/Paybox.php
+++ b/Paybox.php
@@ -37,19 +37,19 @@
 class Paybox extends AbstractPaymentModule
 {
     /** The module domain for internationalisation */
-    public const MODULE_DOMAIN = 'paybox';
+    const MODULE_DOMAIN = 'paybox';
 
     /** The module domain for internationalisation */
-    public const MODULE_CODE = 'Paybox';
+    const MODULE_CODE = 'Paybox';
 
     /** The confirmation message identifier */
-    public const CONFIRMATION_MESSAGE_NAME = 'paybox_payment_confirmation';
+    const CONFIRMATION_MESSAGE_NAME = 'paybox_payment_confirmation';
 
     // Liste des variables retournées par paybox
-    public const PARAMETRES_RETOUR = 'montant:M;ref:R;auto:A;trans:T;erreur:E;sign:K';
+    const PARAMETRES_RETOUR = 'montant:M;ref:R;auto:A;trans:T;erreur:E;sign:K';
 
     /** The notification of payment confirmation */
-    public const NOTIFICATION_MESSAGE_NAME = 'paybox_payment_status_notification';
+    const NOTIFICATION_MESSAGE_NAME = 'paybox_payment_status_notification';
 
     public function postActivation(ConnectionInterface $con = null): void
     {