diff --git a/src/Contracts/ModifiesDatabaseNameForConnection.php b/src/Contracts/ModifiesDatabaseNameForConnection.php
index 57114c38..713aa3be 100644
--- a/src/Contracts/ModifiesDatabaseNameForConnection.php
+++ b/src/Contracts/ModifiesDatabaseNameForConnection.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Stancl\Tenancy\Contracts;
 
 /**
@@ -8,4 +10,4 @@ namespace Stancl\Tenancy\Contracts;
 interface ModifiesDatabaseNameForConnection
 {
     public function getDatabaseNameForConnection(string $original): string;
-}
\ No newline at end of file
+}