diff --git a/CHANGELOG b/CHANGELOG
index 16672392a8..317ae0f13e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+# 2.15.3 (2022-XX-XX)
+
+ * n/a
+
 # 2.15.2 (2022-08-12)
 
  * Allow inherited magic method to still run with calling class
diff --git a/src/Environment.php b/src/Environment.php
index af056762d2..c5040a345a 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -38,12 +38,12 @@
  */
 class Environment
 {
-    public const VERSION = '2.15.2';
-    public const VERSION_ID = 21502;
+    public const VERSION = '2.15.3-DEV';
+    public const VERSION_ID = 21503;
     public const MAJOR_VERSION = 2;
     public const MINOR_VERSION = 15;
-    public const RELEASE_VERSION = 2;
-    public const EXTRA_VERSION = '';
+    public const RELEASE_VERSION = 3;
+    public const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;