diff --git a/CHANGELOG b/CHANGELOG
index b13c4e075..4371f36ee 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -4,6 +4,10 @@
 
 http://openslides.org
 
+Version 1.4.3 (unreleased)
+==========================
+
+
 Version 1.4.2 (2013-09-10) 
 ==========================
 [https://github.com/OpenSlides/OpenSlides/issues?milestone=12]
diff --git a/INSTALL.txt b/INSTALL.txt
index 393d436cb..654fbe443 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -1,5 +1,5 @@
 ================================================
- Installation instructions for OpenSlides 1.4.2
+ Installation instructions for OpenSlides 1.4.3
 ================================================
 
 Content
diff --git a/README.txt b/README.txt
index 6707e36f0..1f51982e8 100644
--- a/README.txt
+++ b/README.txt
@@ -2,7 +2,7 @@
  English README file for OpenSlides
 ====================================
 
-This is OpenSlides, version 1.4.2 (2013-09-10).
+This is OpenSlides, version 1.4.3 (unreleased).
 
 
 What is OpenSlides?
diff --git a/openslides/__init__.py b/openslides/__init__.py
index 8839755f6..1ec30013e 100644
--- a/openslides/__init__.py
+++ b/openslides/__init__.py
@@ -5,8 +5,8 @@
     :license: GNU GPL, see LICENSE for more details.
 """
 
-VERSION = (1, 4, 2, 'final', 1)  # During development it is the next release
-RELEASE = True
+VERSION = (1, 4, 3, 'final', 1)  # During development it is the next release
+RELEASE = False
 
 
 def get_version(version=None, release=None):