diff --git a/composer.json b/composer.json
index 0f85cf0..a8cb1ef 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,8 @@
             "composer/package-versions-deprecated": true,
             "simplesamlphp/composer-module-installer": true,
             "dealerdirect/phpcodesniffer-composer-installer": true,
-            "phpstan/extension-installer": true
+            "phpstan/extension-installer": true,
+            "simplesamlphp/composer-xmlprovider-installer": true
         }
     },
     "autoload": {