diff --git a/src/Middleware/PreventAccessFromTenantDomains.php b/src/Middleware/PreventAccessFromTenantDomains.php
index 567695ad..082a613f 100644
--- a/src/Middleware/PreventAccessFromTenantDomains.php
+++ b/src/Middleware/PreventAccessFromTenantDomains.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Stancl\Tenancy\Middleware;
 
 use Closure;