diff --git a/src/Database/Contracts/StatefulTenantDatabaseManager.php b/src/Database/Contracts/StatefulTenantDatabaseManager.php
index 36a08db2..1a2e928d 100644
--- a/src/Database/Contracts/StatefulTenantDatabaseManager.php
+++ b/src/Database/Contracts/StatefulTenantDatabaseManager.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Stancl\Tenancy\Database\Contracts;
 
 use Illuminate\Database\Connection;