diff --git a/README.md b/README.md
index f9aec4b..8d1f382 100644
--- a/README.md
+++ b/README.md
@@ -88,6 +88,7 @@
 
 Copyright 2020 Xogium and other contributors
 This project is licensed under the GNU GPL version 3 or later.
+Some portions are licensed under the CC0.
 This project includes third party works as-is or modified.
 These works are authored by others and available under open source licenses.
 See 'COPYRIGHT.md' for full details.