diff --git a/doc/conf.py b/doc/conf.py
index a0d3f71f6e..2467fea617 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -47,9 +47,9 @@ copyright = '2008-2011,  Anne Krings, Bertrand Chenal, Cédric Krier, \
 # built documents.
 #
 # The short X.Y version.
-version = '5.0'
+version = '5.1'
 # The full version, including alpha/beta/rc tags.
-release = '5.0'
+release = '5.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/tryton/__init__.py b/tryton/__init__.py
index b1c993a443..130a69ece8 100644
--- a/tryton/__init__.py
+++ b/tryton/__init__.py
@@ -1,6 +1,6 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-__version__ = "5.0.0"
+__version__ = "5.1.0"
 import sys
 
 import gi