diff --git a/CHANGELOG b/CHANGELOG
index 74877d632..d21184696 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+# 3.28.1 (2026-XX-XX)
+
+ * n/a
+
 # 3.28.0 (2026-07-03)
 
  * Render backed enums using their backing value in the `html_attr` function
diff --git a/src/Environment.php b/src/Environment.php
index 272799715..71459e210 100644
--- a/src/Environment.php
+++ b/src/Environment.php
@@ -43,12 +43,12 @@ use Twig\TokenParser\TokenParserInterface;
  */
 class Environment
 {
-    public const VERSION = '3.28.0';
-    public const VERSION_ID = 32800;
+    public const VERSION = '3.28.1-DEV';
+    public const VERSION_ID = 32801;
     public const MAJOR_VERSION = 3;
     public const MINOR_VERSION = 28;
-    public const RELEASE_VERSION = 0;
-    public const EXTRA_VERSION = '';
+    public const RELEASE_VERSION = 1;
+    public const EXTRA_VERSION = 'DEV';
 
     private $charset;
     private $loader;