diff --git a/CHANGELOG b/CHANGELOG
index 2f86821bf..bf0daaa0e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,18 @@ CHANGELOG of OpenSlides
 http://openslides.org
 
 
+Version 1.4 (unreleased)
+========================
+
+
+Version 1.3.1 (2013-01-09)
+==========================
+[http://dev.openslides.org/milestone/1.3.1]
+
+- Fixed unwanted automatical language switching on projector view if more than 
+  one browser languages send projector request to OpenSlides (#434)
+
+
 Version 1.3 (2012-12-10)
 ========================
 [http://dev.openslides.org/milestone/1.3]
diff --git a/README.txt b/README.txt
index 0485a2203..cdbe0880b 100644
--- a/README.txt
+++ b/README.txt
@@ -2,7 +2,7 @@
 English README file for OpenSlides
 ==================================
 
-This is OpenSlides, version 1.3.1 (unreleased).
+This is OpenSlides, version 1.4.0 (unreleased).
 
 
 What is OpenSlides?