diff --git a/README.rst b/README.rst
index aa1c840..3c00ded 100644
--- a/README.rst
+++ b/README.rst
@@ -153,6 +153,10 @@ currency are converted  into the display currency of the parent cash book.
 Changes
 =======
 
+*6.8.31 - 30.11.2023*
+
+- optimized ir.rule
+
 *6.8.30 - 25.07.2023*
 
 - updt: optimize code, add tests
diff --git a/tryton.cfg b/tryton.cfg
index 2c2d189..fa5bb18 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -1,5 +1,5 @@
 [tryton]
-version=6.8.30
+version=6.8.31
 depends:
     res
     currency