diff --git a/modules/cron/routing/routes/routes.yaml b/modules/cron/routing/routes/routes.yaml
index d25718ad1571cdfd3a44821af605c898fd79af8a..ed4a241559e91bd9afdf4f06b2ca3f0abb7267bf 100644
--- a/modules/cron/routing/routes/routes.yaml
+++ b/modules/cron/routing/routes/routes.yaml
@@ -3,4 +3,4 @@ cron-croninfo:
     defaults:   { _controller: 'SimpleSAML\Module\cron\Controller\Cron::info' }
 cron-run:
     path:       /run/{tag}/{key}/{output}
-    defaults:   { _controller: 'SimpleSAML\Module\cron\Controller\Cron::run', output: null }
+    defaults:   { _controller: 'SimpleSAML\Module\cron\Controller\Cron::run', output: 'silent' }