diff --git a/modules/distribution/module.json b/modules/distribution/module.json
index 3a7c85f..7783baf 100644
--- a/modules/distribution/module.json
+++ b/modules/distribution/module.json
@@ -74,6 +74,7 @@
       ],
       "args": [
         "garbage-collect",
+        "--dry-run",
         "/etc/docker/registry/config.yml"
       ],
       "schedule": "30 3 * * *",