diff --git a/CHANGELOG b/CHANGELOG
index 42aaf73e2..5fef904e9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+* 2.2.1 (2017-XX-XX)
+
+ * n/a
+
 * 2.2.0 (2017-02-26)
 
  * added a PSR-11 compatible runtime loader
diff --git a/lib/Twig/Environment.php b/lib/Twig/Environment.php
index f25f2b25f..400727df9 100644
--- a/lib/Twig/Environment.php
+++ b/lib/Twig/Environment.php
@@ -16,12 +16,12 @@
  */
 class Twig_Environment
 {
-    const VERSION = '2.2.0';
-    const VERSION_ID = 20200;
+    const VERSION = '2.2.1';
+    const VERSION_ID = 20201;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 2;
-    const RELEASE_VERSION = 0;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 1;
+    const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;