diff --git a/dataswamp/services.go b/dataswamp/services.go
index 27ae628..c35e032 100644
--- a/dataswamp/services.go
+++ b/dataswamp/services.go
@@ -117,6 +117,9 @@ func (s SwampFileService) OpenOutFile(ref swampfile.FileReference) (swampfile.Sw
 		return nil, err
 	}
 
+	ns.Download = ns.Download.Add(f.Size())
+	s.namespace_repo.Update(ns.ID, *ns)
+
 	return f, nil
 }