diff --git a/src/Adapter/Ldap.php b/src/Adapter/Ldap.php
index f4cc40c..0e19014 100644
--- a/src/Adapter/Ldap.php
+++ b/src/Adapter/Ldap.php
@@ -2,7 +2,12 @@
 
 namespace Ulmus\Ldap\Adapter;
 
-use Ulmus\{Common\PdoObject, Exception\AdapterConfigurationException, Ldap\Entity\User, Ulmus};
+use Ulmus\{Adapter\AdapterInterface,
+    Common\PdoObject,
+    Exception\AdapterConfigurationException,
+    Ldap\Entity\User,
+    Migration\FieldDefinition,
+    Ulmus};
 
 use Ulmus\Ldap\Common\LdapObject;
 
@@ -10,6 +15,10 @@ use function ldap_set_option, ldap_start_tls, ldap_bind, ldap_unbind, ldap_conne
 
 class Ldap implements \Ulmus\Adapter\AdapterInterface {
 
+    const ALLOWED_ATTRIBUTES = [
+        ''
+    ];
+
     public const IDENTIFIER_DN = 101;
 
     public const IDENTIFIER_FILTER = 102;
@@ -199,4 +208,15 @@ class Ldap implements \Ulmus\Adapter\AdapterInterface {
         return $this->baseDn;
     }
 
+    public function whitelistAttributes(array &$parameters) : void
+    {
+        $parameters = array_intersect_key($parameters, array_flip(static::ALLOWED_ATTRIBUTES));
+    }
+
+    public function generateAlterColumn(FieldDefinition $definition, array $field) : string|\Stringable
+    {
+        return implode(" ", [
+
+        ]);
+    }
 }
\ No newline at end of file
diff --git a/src/ConnectionAdapter.php b/src/ConnectionAdapter.php
index a6701a8..5c64764 100644
--- a/src/ConnectionAdapter.php
+++ b/src/ConnectionAdapter.php
@@ -63,7 +63,7 @@ class ConnectionAdapter extends \Ulmus\ConnectionAdapter
      */
     protected function instanciateAdapter($name) : AdapterInterface
     {
-        $class = substr($name, 0, 2) === "\\" ? $name : "\\Ulmus\\Adapter\\$name";
+        $class = substr($name, 0, 2) === "\\" ? $name : "\\Ulmus\\Ldap\\Adapter\\$name";
         
         return new $class();
     }
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 72fdc51..0719e7c 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -94,7 +94,7 @@ class User
     /**
      * @Virtual
      */
-    public ? array $memberOf;
+    # public ? array $memberOf;
 
     /**
      * @Field