diff --git a/CHANGELOG b/CHANGELOG
index fda0e08f2..92014d0d3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,6 +4,11 @@
 
 https://openslides.org/
 
+Version 2.0.1 (unreleased)
+==========================
+[https://github.com/OpenSlides/OpenSlides/milestones/2.0.1]
+
+
 Version 2.0 (2016-04-18)
 ========================
 [https://github.com/OpenSlides/OpenSlides/milestones/2.0]
diff --git a/openslides/__init__.py b/openslides/__init__.py
index 76483800f..185d6f3f8 100644
--- a/openslides/__init__.py
+++ b/openslides/__init__.py
@@ -1,3 +1,3 @@
 __author__ = 'OpenSlides Team <support@openslides.org>'
 __description__ = 'Presentation and assembly system'
-__version__ = '2.0'
+__version__ = '2.0.1-dev'