diff --git a/composer.json b/composer.json
index 9bd33b0f45..6879098ad8 100644
--- a/composer.json
+++ b/composer.json
@@ -60,7 +60,7 @@
     },
     "require-release": {
         "php": ">=7.4 <8.4",
-        "atk4/data": "~5.2.0",
+        "atk4/data": "~5.3.0",
         "nyholm/psr7": "^1.6",
         "nyholm/psr7-server": "^1.0",
         "symfony/filesystem": "^4.4 || ^5.3 || ^6.0",
diff --git a/src/App.php b/src/App.php
index 31f088b0ac..9eb0e44bc7 100644
--- a/src/App.php
+++ b/src/App.php
@@ -67,7 +67,7 @@ class App
      *
      * @TODO remove, no longer needed for CDN versioning as we bundle all resources
      */
-    public $version = '5.2-dev';
+    public $version = '5.3-dev';
 
     /** @var string Name of application */
     public $title = 'Agile UI - Untitled Application';