diff --git a/README.rst b/README.rst
index 9b320f2..12e4b25 100644
--- a/README.rst
+++ b/README.rst
@@ -153,6 +153,10 @@ currency are converted  into the display currency of the parent cash book.
 Changes
 =======
 
+*6.0.28 - 05.06.2023*
+
+- code optimized
+
 *6.0.27 - 05.03.2023*
 
 - updt: optimize caching
diff --git a/tryton.cfg b/tryton.cfg
index 5d0fae9..caff363 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.0.27
+version=6.0.28
 depends:
     res
     currency