diff --git a/src/GraphQLMiddleware.php b/src/GraphQLMiddleware.php
index 2e2648e..789279f 100644
--- a/src/GraphQLMiddleware.php
+++ b/src/GraphQLMiddleware.php
@@ -5,6 +5,7 @@
 
 use App\Jwt\JwtConfiguration;
 use Firebase\JWT\JWT;
+use Firebase\JWT\Key;
 use GraphQL\Server\ServerConfig;
 use GraphQL\Server\StandardServer;
 use Laminas\Diactoros\Response\JsonResponse;