diff --git a/CHANGELOG b/CHANGELOG
index a9d9e4a8a..b352bdfd1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,7 +1,11 @@
-* 2.4.2 (2017-06-05)
+* 2.4.3 (2017-XX-XX)
 
  * n/a
 
+* 2.4.2 (2017-06-05)
+
+ * fixed namespaces introduction
+
 * 2.4.1 (2017-06-05)
 
  * fixed namespaces introduction
diff --git a/lib/Twig/Environment.php b/lib/Twig/Environment.php
index ab91e4ff7..fcc67f91e 100644
--- a/lib/Twig/Environment.php
+++ b/lib/Twig/Environment.php
@@ -16,12 +16,12 @@
  */
 class Twig_Environment
 {
-    const VERSION = '2.4.2';
-    const VERSION_ID = 20402;
+    const VERSION = '2.4.3-DEV';
+    const VERSION_ID = 20403;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 4;
-    const RELEASE_VERSION = 2;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 3;
+    const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;