diff --git a/COPYRIGHT b/COPYRIGHT
index 8a21255..38bee72 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,5 +1,6 @@
-Copyright (C) 2024-2025 martin-data services.
-Copyright (C) 2025 Mathias Behrle <mathiasb@m9s.biz>
+Copyright (C) 2015-2025 Cédric Krier.
+Copyright (C) 2015-2025 B2CK SPRL.
+Copyright (C) 2021-2025 martin-data services.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/README.rst b/README.rst
index c95392e..3f43e60 100644
--- a/README.rst
+++ b/README.rst
@@ -9,12 +9,22 @@ pip install mds-document-incoming-invoice-xml
 
 Requires
 ========
-- Tryton 7.0
+- Tryton 6.8
 
 
 Changes
 =======
 
-*7.0.0 - 19.12.2024*
+*6.8.3 - 27.01.2025*
 
-- init
+- filter product-categories in configuration
+
+*6.8.2 - 24.01.2025*
+
+- fix: limit content-check to supplier-invoices
+
+*6.8.1 - 19.12.2024*
+
+- compatibility to Tryton 6.8
+- import of Factur-X (Basic, EN16931, Extended), CrossIndustryInvoice-D22
+- with/without PDF-Container
diff --git a/document.py b/document.py
index 39b1f00..3445df8 100644
--- a/document.py
+++ b/document.py
@@ -20,7 +20,6 @@ from trytond.i18n import gettext
 from trytond.model import fields
 from trytond.pyson import Eval
 from trytond.protocols.jsonrpc import JSONEncoder
-from trytond.modules.product import round_price
 
 
 xml_types = [
@@ -720,15 +719,12 @@ class Incoming(metaclass=PoolMeta):
             if units:
                 xml_uom = units[0]
 
-        unitprice = line_data.get('unit_net_price', {}).pop('amount', None)
         line = Line(
             invoice=invoice,
             type='line',
             unit=xml_uom,
-            quantity=xml_uom.round(
-                line_data.get('quantity', {}).pop('billed', None)),
-            unit_price=round_price(unitprice)
-            if unitprice is not None else Decimal('0.0'))
+            quantity=line_data.get('quantity', {}).pop('billed', None),
+            unit_price=line_data.get('unit_net_price', {}).pop('amount', None))
         line_no = line_data.pop('line_no', None)
 
         # description
@@ -967,9 +963,9 @@ class Incoming(metaclass=PoolMeta):
         result['quantity'] = self._readxml_read_listdata(
             xmldata, xpath_line, [
                 'ram:SpecifiedLineTradeDelivery'], [
-                ('ram:BilledQuantity', 'billed', float),
-                ('ram:ChargeFreeQuantity', 'chargefree', float),
-                ('ram:PackageQuantity', 'package', float),
+                ('ram:BilledQuantity', 'billed', Decimal),
+                ('ram:ChargeFreeQuantity', 'chargefree', Decimal),
+                ('ram:PackageQuantity', 'package', Decimal),
                 ])[0]
         result['quantity']['unit_code'] = self._readxml_getattrib(
             xmldata, xpath_quantity + ['ram:BilledQuantity'], 'unitCode')
diff --git a/setup.py b/setup.py
index 559ba9e..9c57c51 100644
--- a/setup.py
+++ b/setup.py
@@ -34,8 +34,8 @@ with open(path.join(here, 'versiondep.txt'), encoding='utf-8') as f:
         modversion[l2[0]] = {'min': l2[1], 'max': l2[2], 'prefix': l2[3]}
 
 # tryton-version
-major_version = 7
-minor_version = 0
+major_version = 6
+minor_version = 8
 
 requires = ['pypdf', 'factur-x', 'lxml']
 for dep in info.get('depends', []):
@@ -85,8 +85,6 @@ setup(
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-        'Programming Language :: Python :: 3.12',
     ],
 
     keywords='tryton account invoice xrechnung edocument incoming',
diff --git a/tests/parsed_data.py b/tests/parsed_data.py
index 351052d..0e5315f 100644
--- a/tests/parsed_data.py
+++ b/tests/parsed_data.py
@@ -23,7 +23,7 @@ parsed_data_ci_invoice = {
             'total': {'amount': Decimal('1350.00')},
             'line_no': '1',
             'quantity': {
-                'billed': 1.0,
+                'billed': Decimal('1.0'),
                 'unit_code': 'KGM'},
             'unit_net_price': {'amount': Decimal('1350.00')},
         }, {
@@ -34,7 +34,7 @@ parsed_data_ci_invoice = {
             'total': {'amount': Decimal('1200.00')},
             'line_no': '2',
             'quantity': {
-                'billed': 1.5,
+                'billed': Decimal('1.5'),
                 'unit_code': 'KGM'},
             'unit_net_price': {'amount': Decimal('800.00')},
         }, {
@@ -42,7 +42,7 @@ parsed_data_ci_invoice = {
             'total': {'amount': Decimal('300.00')},
             'line_no': '3',
             'quantity': {
-                'billed': 2.0,
+                'billed': Decimal('2.0'),
                 'unit_code': 'MTR'},
             'unit_net_price': {'amount': Decimal('150.00')}}],
     'note_list': [{
@@ -101,7 +101,7 @@ parsed_data_facturx_en16931 = {
             'description': 'Description of Product 1',
             'unit_net_price': {'amount': Decimal('1350.00')},
             'quantity': {
-                'billed': 1.0, 'unit_code': 'KGM'},
+                'billed': Decimal('1.0'), 'unit_code': 'KGM'},
             'taxes': [{
                 'type': 'VAT',
                 'category_code': 'S',
@@ -127,7 +127,7 @@ parsed_data_facturx_en16931 = {
                 'amount': Decimal('950.00'),
                 'basequantity': Decimal('1.0')},
             'quantity': {
-                'billed': 1.5,
+                'billed': Decimal('1.5'),
                 'unit_code': 'KGM'},
             'taxes': [{
                 'type': 'VAT',
@@ -141,7 +141,7 @@ parsed_data_facturx_en16931 = {
             'description': 'Description of Product 3',
             'unit_net_price': {'amount': Decimal('150.00')},
             'quantity': {
-                'billed': 2.0,
+                'billed': Decimal('2.0'),
                 'unit_code': 'MTR'},
             'taxes': [{
                 'type': 'VAT',
@@ -213,7 +213,7 @@ parsed_data_facturx_basic = {
             'line_no': '1',
             'name': 'Name of Product 1',
             'unit_net_price': {'amount': Decimal('1350.00')},
-            'quantity': {'billed': 1.0, 'unit_code': 'KGM'},
+            'quantity': {'billed': Decimal('1.0'), 'unit_code': 'KGM'},
             'taxes': [{
                 'type': 'VAT',
                 'category_code': 'S',
@@ -231,7 +231,7 @@ parsed_data_facturx_basic = {
                 'amount': Decimal('950.00'),
                 'basequantity': Decimal('1.0')},
             'quantity': {
-                'billed': 1.5,
+                'billed': Decimal('1.5'),
                 'unit_code': 'KGM'},
             'taxes': [{
                 'type': 'VAT',
@@ -243,7 +243,7 @@ parsed_data_facturx_basic = {
             'name': 'Name of Product 3',
             'unit_net_price': {'amount': Decimal('150.00')},
             'quantity': {
-                'billed': 2.0,
+                'billed': Decimal('2.0'),
                 'unit_code': 'MTR'},
             'taxes': [{
                 'type': 'VAT',
@@ -328,7 +328,7 @@ parsed_data_facturx_extended = {
             'name': 'Name of Product 1',
             'description': 'Description of Product 1',
             'unit_net_price': {'amount': Decimal('1350.00')},
-            'quantity': {'billed': 1.0, 'unit_code': 'KGM'},
+            'quantity': {'billed': Decimal('1.0'), 'unit_code': 'KGM'},
             'taxes': [{
                 'type': 'VAT',
                 'category_code': 'S',
@@ -379,7 +379,7 @@ parsed_data_facturx_extended = {
                 'amount': Decimal('950.00'),
                 'basequantity': Decimal('1.0')},
             'quantity': {
-                'billed': 1.5,
+                'billed': Decimal('1.5'),
                 'unit_code': 'KGM',
                 'package': Decimal('1.5')},
             'taxes': [{
@@ -392,7 +392,7 @@ parsed_data_facturx_extended = {
             'name': 'Name of Product 3',
             'description': 'Description of Product 3',
             'unit_net_price': {'amount': Decimal('150.00')},
-            'quantity': {'billed': 2.0, 'unit_code': 'MTR'},
+            'quantity': {'billed': Decimal('2.0'), 'unit_code': 'MTR'},
             'taxes': [{
                 'type': 'VAT',
                 'category_code': 'S',
diff --git a/tryton.cfg b/tryton.cfg
index fde7a46..c4252be 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=7.0.0
+version=6.8.3
 depends:
     document_incoming_invoice
     edocument_unece
diff --git a/versiondep.txt b/versiondep.txt
index e69de29..1b34c4b 100644
--- a/versiondep.txt
+++ b/versiondep.txt
@@ -0,0 +1,2 @@
+document_incoming_invoice;6.8.0;6.8.999;mds
+sale_point_invoice;6.8.15;6.8.999;mds