diff --git a/CHANGELOG b/CHANGELOG
index 3deb94544..ee49bf86e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+* 2.10.1 (2019-XX-XX)
+
+ * n/a
+
 * 2.10.0 (2019-05-14)
 
  * deprecated "if" conditions on "for" tags
diff --git a/src/Environment.php b/src/Environment.php
index 89828b7b0..74d43ae3f 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -38,12 +38,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    const VERSION = '2.10.0';
-    const VERSION_ID = 21000;
+    const VERSION = '2.10.1-DEV';
+    const VERSION_ID = 21001;
     const MAJOR_VERSION = 2;
     const MINOR_VERSION = 10;
-    const RELEASE_VERSION = 0;
-    const EXTRA_VERSION = '';
+    const RELEASE_VERSION = 1;
+    const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;