diff --git a/composer.json b/composer.json
index 71fde76..aabaf49 100644
--- a/composer.json
+++ b/composer.json
@@ -19,11 +19,11 @@
     }
   },
   "require-dev": {
-    "vimeo/psalm": "^4.3",
+    "vimeo/psalm": "^4.11",
     "squizlabs/php_codesniffer": "^3.5",
     "phpmd/phpmd": "^2.8",
     "phpro/grumphp": "^0.19 || ^1.2.0",
-    "phpstan/phpstan": "^0.12.91"
+    "phpstan/phpstan": "^0.12.99"
   },
   "suggest": {
     "vimeo/psalm": "Using psalm with this 'contract' will enable immutability and strong typing verification"
diff --git a/src/Presentation/ViewModel/ViewModel.php b/src/Presentation/ViewModel/ViewModel.php
new file mode 100644
index 0000000..2439c16
--- /dev/null
+++ b/src/Presentation/ViewModel/ViewModel.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @author: Julien Mercier-Rojas <julien@jeckel-lab.fr>
+ * Created at: 26/10/2021
+ */
+
+declare(strict_types=1);
+
+namespace JeckelLab\Contract\Presentation\ViewModel;
+
+use JsonSerializable;
+
+/**
+ * @psalm-immutable
+ */
+interface ViewModel extends JsonSerializable
+{
+
+}