diff --git a/doc/conf.py b/doc/conf.py
index 87f63a7..419e9a4 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -48,7 +48,7 @@ copyright = u'2009-2016, Petri Lehtinen'
 # built documents.
 #
 # The short X.Y version.
-version = '2.9'
+version = '2.10-dev'
 # The full version, including alpha/beta/rc tags.
 release = version