diff --git a/classes/core_jwt_manager.php b/classes/core_jwt_manager.php
index 290d3aa..69247ea 100644
--- a/classes/core_jwt_manager.php
+++ b/classes/core_jwt_manager.php
@@ -16,7 +16,7 @@
 
 namespace auth_jwt;
 
-require_once("../vendor/autoload.php");
+require_once(__DIR__ . '/../vendor/autoload.php');
 
 use \Firebase\JWT\JWT;