1 files changed, 4 insertions, 0 deletions
diff --git a/graph.go b/graph.go
index 4f8f186..c56ba48 100644
--- a/graph.go
+++ b/graph.go
@@ -1,3 +1,7 @@
+// Copyright 2019 Nick White.
+// Use of this source code is governed by the GPLv3
+// license that can be found in the LICENSE file.
+
 package bookpipeline
 
 import (