diff --git a/composer.json b/composer.json
index 4992e2b..7379c53 100644
--- a/composer.json
+++ b/composer.json
@@ -7,5 +7,6 @@
   },
   "replace": {
     "bestit/amazonpay4oxid": "*"
-  }
+  },
+  "license": "GPL-3.0-or-later"
 }