diff --git a/manifests/database.yaml b/manifests/database.yaml
index 4884686..162639e 100644
--- a/manifests/database.yaml
+++ b/manifests/database.yaml
@@ -34,6 +34,7 @@ spec:
       wal_compression: "on"
 
   backup:
+    retentionPolicy: "30d"
     barmanObjectStore:
       destinationPath: "s3://halis/cloudnativepg"
       endpointURL: https://s3.halia.dev