diff --git a/go.mod b/go.mod
index d6e53ac..07d042d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,4 @@
+// Deprecated: Punktum.dk has closed the DS-update Service, see https://punktum.dk/artikler/breaking-changes
 module arnested.dk/go/dsupdate
 
 go 1.18