diff --git a/README.rst b/README.rst
index 3ea8f7a..1b59e78 100644
--- a/README.rst
+++ b/README.rst
@@ -14,6 +14,10 @@ Requires
 Changes
 =======
 
+*6.0.4 - 06.06.2023*
+
+- code optimized
+
 *6.0.3 - 14.02.2023*
 
 - updt: setup.py
diff --git a/tests/test_line.py b/tests/test_line.py
index e934698..a6fbe1d 100644
--- a/tests/test_line.py
+++ b/tests/test_line.py
@@ -8,7 +8,7 @@ from PIL import Image
 from trytond.tests.test_tryton import with_transaction
 from trytond.pool import Pool
 from trytond.exceptions import UserError
-from trytond.modules.cashbook.tests import CashbookTestCase
+from trytond.modules.cashbook.tests.test_module import CashbookTestCase
 from datetime import date
 from decimal import Decimal
 from .img_data import img_data_png, dok_data_pdf, text_data
diff --git a/tryton.cfg b/tryton.cfg
index 442be0a..733ce38 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.0.3
+version=6.0.4
 depends:
     cashbook
 xml:
diff --git a/versiondep.txt b/versiondep.txt
index 5600818..834317e 100644
--- a/versiondep.txt
+++ b/versiondep.txt
@@ -1 +1 @@
-cashbook;6.0.25;6.0.999;mds
+cashbook;6.0.28;6.0.999;mds