diff --git a/osbase/net/dns/dns.go b/osbase/net/dns/dns.go
index 3207622..f7094b9 100644
--- a/osbase/net/dns/dns.go
+++ b/osbase/net/dns/dns.go
@@ -1,3 +1,6 @@
+// Copyright The Monogon Project Authors.
+// SPDX-License-Identifier: Apache-2.0
+
 // Package dns provides a DNS server for resolving services against.
 package dns