diff --git a/CHANGELOG b/CHANGELOG
index 5130ac671..b6b063119 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-* 2.11.2 (2019-XX-XX)
+* 2.12.0 (2019-XX-XX)
 
  * n/a
 
diff --git a/composer.json b/composer.json
index b0c5836f8..c93fa5ec8 100644
--- a/composer.json
+++ b/composer.json
@@ -48,7 +48,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.11-dev"
+            "dev-master": "2.12-dev"
         }
     }
 }
diff --git a/src/Environment.php b/src/Environment.php
index e8acb49db..2d2bc6fbb 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -38,11 +38,11 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    const VERSION = '2.11.2-DEV';
-    const VERSION_ID = 21102;
+    const VERSION = '2.12.0-DEV';
+    const VERSION_ID = 21200;
     const MAJOR_VERSION = 2;
-    const MINOR_VERSION = 11;
-    const RELEASE_VERSION = 2;
+    const MINOR_VERSION = 12;
+    const RELEASE_VERSION = 0;
     const EXTRA_VERSION = 'DEV';
 
     private $charset;