diff --git a/www/lib/class.erpapi.php b/www/lib/class.erpapi.php
index de87fb3e..a6dfeac7 100644
--- a/www/lib/class.erpapi.php
+++ b/www/lib/class.erpapi.php
@@ -1,4 +1,11 @@
 <?php
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ * SPDX-FileCopyrightText: 2019 Xentral (c) Xentral ERP Software GmbH, Fuggerstrasse 11, D-86150 Augsburg, Germany
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 /*
 **** COPYRIGHT & LICENSE NOTICE *** DO NOT REMOVE ****
 * 
diff --git a/www/lib/class.remote.php b/www/lib/class.remote.php
index 05d71eec..9dbfd069 100644
--- a/www/lib/class.remote.php
+++ b/www/lib/class.remote.php
@@ -1,4 +1,11 @@
 <?php
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ * SPDX-FileCopyrightText: 2019 Xentral (c) Xentral ERP Software GmbH, Fuggerstrasse 11, D-86150 Augsburg, Germany
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 /*
 **** COPYRIGHT & LICENSE NOTICE *** DO NOT REMOVE ****
 * 
diff --git a/www/pages/appstore.php b/www/pages/appstore.php
index 5ada3d28..6c9c7c89 100644
--- a/www/pages/appstore.php
+++ b/www/pages/appstore.php
@@ -1,4 +1,11 @@
 <?php
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ * SPDX-FileCopyrightText: 2019 Xentral (c) Xentral ERP Software GmbH, Fuggerstrasse 11, D-86150 Augsburg, Germany
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 /*
 **** COPYRIGHT & LICENSE NOTICE *** DO NOT REMOVE ****
 * 
diff --git a/www/pages/shopimport.php b/www/pages/shopimport.php
index 291e3d90..e80f83dd 100644
--- a/www/pages/shopimport.php
+++ b/www/pages/shopimport.php
@@ -1,4 +1,11 @@
 <?php
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ * SPDX-FileCopyrightText: 2019 Xentral (c) Xentral ERP Software GmbH, Fuggerstrasse 11, D-86150 Augsburg, Germany
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 /*
 **** COPYRIGHT & LICENSE NOTICE *** DO NOT REMOVE ****
 * 
diff --git a/www/pages/shopimporter_presta.php b/www/pages/shopimporter_presta.php
index 818c56fc..f02a8114 100644
--- a/www/pages/shopimporter_presta.php
+++ b/www/pages/shopimporter_presta.php
@@ -1,5 +1,11 @@
 <?php
 
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 class Shopimporter_Presta extends ShopimporterBase
 {
   private $app;
diff --git a/www/pages/steuersaetze.php b/www/pages/steuersaetze.php
index 7cc77d71..f9d1a06b 100644
--- a/www/pages/steuersaetze.php
+++ b/www/pages/steuersaetze.php
@@ -1,4 +1,11 @@
 <?php
+/*
+ * SPDX-FileCopyrightText: 2022 Andreas Palm
+ * SPDX-FileCopyrightText: 2019 Xentral (c) Xentral ERP Software GmbH, Fuggerstrasse 11, D-86150 Augsburg, Germany
+ *
+ * SPDX-License-Identifier: LicenseRef-EGPL-3.1
+ */
+
 /*
 **** COPYRIGHT & LICENSE NOTICE *** DO NOT REMOVE ****
 *