@@ -1,15 +1,9 @@
 #lang scribble/manual
 
-@; Copyright (c) 2019 Joel Dueck
-@;
-@; Copying and distribution of this file, with or without modification,
-@; are permitted in any medium without royalty provided the copyright
-@; notice and this notice are preserved.  This file is offered as-is,
-@; without any warranty.
-
-@; Scribble source for the main page of the code documents.
+@; SPDX-License-Identifier: BlueOak-1.0.0
+@; This file is licensed under the Blue Oak Model License 1.0.0.
 
 @(require "scribble-helpers.rkt")
 
 @title{Local Yarn: source code notes}