diff --git a/composer.json b/composer.json
index d55a9b9..990da01 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,6 @@
         "php": ">=7.4"
     },
     "autoload": {
-        "files": ["error.inc.php"]
+        "classmap": ["error.inc.php"]
     }
 }