diff --git a/actions/TestTaker.php b/actions/TestTaker.php
index 20122ac..90c43fd 100644
--- a/actions/TestTaker.php
+++ b/actions/TestTaker.php
@@ -29,6 +29,7 @@
 use core_kernel_classes_Property;
 use core_kernel_classes_Resource;
 use core_kernel_users_Service;
+use oat\oatbox\validator\ValidatorInterface;
 use oat\generis\Helper\UserHashForEncryption;
 use oat\generis\model\GenerisRdf;
 use oat\generis\model\OntologyAwareTrait;
@@ -44,6 +45,7 @@
 use tao_helpers_Uri;
 use tao_models_classes_UserService;
 use tao_helpers_form_FormContainer as FormContainer;
+use oat\tao\model\Lists\Business\Validation\DependsOnPropertyValidator;
 
 /**
  * Subjects Controller provide actions performed from url resolution
@@ -147,7 +149,14 @@ public function editSubject()
             $clazz,
             $subject,
             $addMode,
-            [FormContainer::CSRF_PROTECTION_OPTION => true]
+            [
+                FormContainer::CSRF_PROTECTION_OPTION => true,
+                FormContainer::ATTRIBUTE_VALIDATORS => [
+                    'data-depends-on-property' => [
+                        $this->getDependsOnPropertyValidator(),
+                    ],
+                ],
+            ]
         );
         $myForm = $myFormContainer->getForm();
 
@@ -270,4 +279,9 @@ public function moveClass()
     {
         return parent::moveResource();
     }
+
+    private function getDependsOnPropertyValidator(): ValidatorInterface
+    {
+        return $this->getPsrContainer()->get(DependsOnPropertyValidator::class);
+    }
 }
diff --git a/composer.json b/composer.json
index e0a3f5e..8cde89a 100644
--- a/composer.json
+++ b/composer.json
@@ -1,56 +1,64 @@
 {
-	"support" : {
-		"forum" : "http://forum.taotesting.com",
-		"issues" : "http://forge.taotesting.com"
-	},
-	"homepage" : "http://www.taotesting.com",
-	"license" : "GPL-2.0-only",
-	"keywords" : [
-		"tao",
-		"oat",
-		"computer-based-assessment"
-	],
-	"name" : "oat-sa/extension-tao-testtaker",
-	"description" : "extension to manage testtakers ",
-	"type" : "tao-extension",
-	"authors" : [{
-			"name" : "Open Assessment Technologies S.A.",
-			"homepage" : "http://www.taotesting.com"
-		}, {
-			"name" : "Jérôme Bogaerts",
-			"role" : "Developer"
-		}, {
-			"name" : "Joel Bout",
-			"role" : "Developer"
-		}, {
-			"name" : "Bertrand Chevrier",
-			"role" : "Developer"
-		}, {
-			"name" : "Lionel Lecaque",
-			"role" : "Developer"
-		}, {
-			"name" : "Patrick Plichart",
-			"role" : "Developer"
-		}, {
-			"name" : "Dieter Raber",
-			"role" : "Developer"
-		}, {
-			"name" : "Somsack Sipasseuth",
-			"role" : "Developer"
-		}
-	],
-	"extra" : {
-		"tao-extension-name" : "taoTestTaker"
-	},
-	"autoload" : {
-		"psr-4" : {
-			"oat\\taoTestTaker\\" : ""
-		}
-	},
-	"require" : {
-		"oat-sa/oatbox-extension-installer" : "~1.1||dev-master",
-		"oat-sa/tao-core" : ">=47.0.0",
-		"oat-sa/generis" : ">=14.0.0",
-		"oat-sa/extension-tao-backoffice" : ">=6.0.0"
-	}
-}
\ No newline at end of file
+    "support": {
+        "forum": "http://forum.taotesting.com",
+        "issues": "http://forge.taotesting.com"
+    },
+    "homepage": "http://www.taotesting.com",
+    "license": "GPL-2.0-only",
+    "keywords": [
+        "tao",
+        "oat",
+        "computer-based-assessment"
+    ],
+    "name": "oat-sa/extension-tao-testtaker",
+    "description": "extension to manage testtakers ",
+    "type": "tao-extension",
+    "authors": [
+        {
+            "name": "Open Assessment Technologies S.A.",
+            "homepage": "http://www.taotesting.com"
+        },
+        {
+            "name": "Jérôme Bogaerts",
+            "role": "Developer"
+        },
+        {
+            "name": "Joel Bout",
+            "role": "Developer"
+        },
+        {
+            "name": "Bertrand Chevrier",
+            "role": "Developer"
+        },
+        {
+            "name": "Lionel Lecaque",
+            "role": "Developer"
+        },
+        {
+            "name": "Patrick Plichart",
+            "role": "Developer"
+        },
+        {
+            "name": "Dieter Raber",
+            "role": "Developer"
+        },
+        {
+            "name": "Somsack Sipasseuth",
+            "role": "Developer"
+        }
+    ],
+    "extra": {
+        "tao-extension-name": "taoTestTaker"
+    },
+    "autoload": {
+        "psr-4": {
+            "oat\\taoTestTaker\\": ""
+        }
+    },
+    "require": {
+        "oat-sa/oatbox-extension-installer": "~1.1||dev-master",
+        "oat-sa/tao-core": ">=48.45.0",
+        "oat-sa/generis": ">=14.0.0",
+        "oat-sa/extension-tao-backoffice": ">=6.0.0"
+    }
+}