1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index 5f902fe..c81daff 100644
--- a/README.md
+++ b/README.md
@@ -152,6 +152,8 @@ Copyright 2016 Marie-Rose for mat2's logo
 The `tests/data/dirty_with_nsid.docx` file is licensed under GPLv3,
 and was borrowed from the Calibre project: https://calibre-ebook.com/downloads/demos/demo.docx
 
+The `narrated_powerpoint_presentation.pptx` file is in the public domain.
+
 # Thanks
 
 mat2 wouldn't exist without: