diff --git a/delivery_gls_nl/__init__.py b/delivery_gls_nl/__init__.py
index 0650744f..09434554 100644
--- a/delivery_gls_nl/__init__.py
+++ b/delivery_gls_nl/__init__.py
@@ -1 +1,3 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
 from . import models
diff --git a/delivery_gls_nl/__manifest__.py b/delivery_gls_nl/__manifest__.py
index 1b27d305..a917e826 100644
--- a/delivery_gls_nl/__manifest__.py
+++ b/delivery_gls_nl/__manifest__.py
@@ -1,10 +1,12 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
 {
     'name': 'GLS Netherlands Shipping',
     'summary': 'Create and print your shipping labels with GLS from the Netherlands.',
-    'version': '12.0.1.0.0',
+    'version': '15.0.1.0.0',
     'author': "Hibou Corp.",
     'category': 'Warehouse',
-    'license': 'AGPL-3',
+    'license': 'LGPL-3',
     'images': [],
     'website': "https://hibou.io",
     'description': """
diff --git a/delivery_gls_nl/models/__init__.py b/delivery_gls_nl/models/__init__.py
index d16621df..3da2e91f 100644
--- a/delivery_gls_nl/models/__init__.py
+++ b/delivery_gls_nl/models/__init__.py
@@ -1 +1,3 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
 from . import delivery_gls_nl
diff --git a/delivery_gls_nl/models/delivery_gls_nl.py b/delivery_gls_nl/models/delivery_gls_nl.py
index c0694d70..659a2873 100644
--- a/delivery_gls_nl/models/delivery_gls_nl.py
+++ b/delivery_gls_nl/models/delivery_gls_nl.py
@@ -1,3 +1,5 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
 from odoo import api, fields, models, _
 from odoo.exceptions import UserError, ValidationError
 from .gls_nl_request import GLSNLRequest
@@ -6,8 +8,8 @@ from base64 import decodebytes
 from csv import reader as csv_reader
 
 
-class ProductPackaging(models.Model):
-    _inherit = 'product.packaging'
+class PackageType(models.Model):
+    _inherit = 'stock.package.type'
 
     package_carrier_type = fields.Selection(selection_add=[('gls_nl', 'GLS Netherlands')])
 
@@ -16,10 +18,11 @@ class ProviderGLSNL(models.Model):
     _inherit = 'delivery.carrier'
 
     GLS_NL_SOFTWARE_NAME = 'Odoo'
-    GLS_NL_SOFTWARE_VER = '12.0'
+    GLS_NL_SOFTWARE_VER = '15.0'
     GLS_NL_COUNTRY_NOT_FOUND = 'GLS_NL_COUNTRY_NOT_FOUND'
 
-    delivery_type = fields.Selection(selection_add=[('gls_nl', 'GLS Netherlands')])
+    delivery_type = fields.Selection(selection_add=[('gls_nl', 'GLS Netherlands')],
+                                     ondelete={'gls_nl': lambda recs: recs.write({'delivery_type': 'fixed', 'fixed_price': 0})})
 
     gls_nl_username = fields.Char(string='GLS NL Username', groups='base.group_system')
     gls_nl_password = fields.Char(string='GLS NL Password', groups='base.group_system')
diff --git a/delivery_gls_nl/models/gls_nl_request.py b/delivery_gls_nl/models/gls_nl_request.py
index 9011ed69..1c92d562 100644
--- a/delivery_gls_nl/models/gls_nl_request.py
+++ b/delivery_gls_nl/models/gls_nl_request.py
@@ -1,3 +1,5 @@
+# Part of Hibou Suite Professional. See LICENSE_PROFESSIONAL file for full copyright and licensing details.
+
 import requests
 from json import dumps