diff --git a/src/Adapter/MsSQL.php b/src/Adapter/MsSQL.php
index b04fc13..d927503 100644
--- a/src/Adapter/MsSQL.php
+++ b/src/Adapter/MsSQL.php
@@ -83,7 +83,7 @@ class MsSQL implements AdapterInterface, MigrateInterface, SqlAdapterInterface {
         }
     }
 
-    public function connect() : Pdo
+    public function connect() : \PDO
     {
         try {
             $pdo = new Pdo\Mssql($this->buildDataSourceName(), $this->username, $this->password);
diff --git a/src/Entity/Sqlite/Table.php b/src/Entity/Sqlite/Table.php
index 259a94a..400d913 100644
--- a/src/Entity/Sqlite/Table.php
+++ b/src/Entity/Sqlite/Table.php
@@ -9,7 +9,7 @@ use Ulmus\Repository;
 #[\Ulmus\Attribute\Obj\Table(name: "sqlite_master")]
 class Table extends Schema
 {
-    public static function repository(string $alias = Repository::DEFAULT_ALIAS, ConnectionAdapter $adapter = null): Repository
+    public static function repository(string $alias = Repository::DEFAULT_ALIAS, ?ConnectionAdapter $adapter = null): Repository
     {
         $repository = new class(static::class, $alias, $adapter) extends Repository\SqliteRepository
         {