diff --git a/CHANGELOG b/CHANGELOG
index fd24dfeae..752a12724 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+* 1.33.3 (2017-XX-XX)
+
+ * n/a
+
 * 1.33.2 (2017-04-20)
 
  * fixed edge case in the method cache for Twig attributes
diff --git a/ext/twig/php_twig.h b/ext/twig/php_twig.h
index 0a12ea575..656cbfba8 100644
--- a/ext/twig/php_twig.h
+++ b/ext/twig/php_twig.h
@@ -15,7 +15,7 @@
 #ifndef PHP_TWIG_H
 #define PHP_TWIG_H
 
-#define PHP_TWIG_VERSION "1.33.2"
+#define PHP_TWIG_VERSION "1.33.3-DEV"
 
 #include "php.h"
 
diff --git a/lib/Twig/Environment.php b/lib/Twig/Environment.php
index ae07a512b..51ffc53fe 100644
--- a/lib/Twig/Environment.php
+++ b/lib/Twig/Environment.php
@@ -16,12 +16,12 @@
  */
 class Twig_Environment
 {
-    const VERSION = '1.33.2';
-    const VERSION_ID = 13302;
+    const VERSION = '1.33.3';
+    const VERSION_ID = 13303;
     const MAJOR_VERSION = 1;
     const MINOR_VERSION = 33;
-    const RELEASE_VERSION = 1;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 3;
+    const EXTRA_VERSION = 'DEV';
 
     protected $charset;
     protected $loader;