diff --git a/CHANGELOG b/CHANGELOG
index bcda10671..81379df8b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+# 2.14.10 (2022-XX-XX)
+
+* n/a
+
 # 2.14.9 (2022-01-03)
 
 * Allow null when Twig expects a string (for better 8.1 support)
diff --git a/src/Environment.php b/src/Environment.php
index 842ba0f4d..2d2685726 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -38,12 +38,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    public const VERSION = '2.14.9';
-    public const VERSION_ID = 21409;
+    public const VERSION = '2.14.10-DEV';
+    public const VERSION_ID = 21410;
     public const MAJOR_VERSION = 2;
     public const MINOR_VERSION = 14;
-    public const RELEASE_VERSION = 9;
-    public const EXTRA_VERSION = '';
+    public const RELEASE_VERSION = 10;
+    public const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;