diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 62c6013c6..f61668a35 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1135,7 +1135,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Airbnb JavaScript Style Guide](https://airbnb.io/javascript/) - Airbnb (HTML)
 * [Basic JavaScript for the impatient programmer](http://www.2ality.com/2013/06/basic-javascript.html) - Axel Rauschmayer (HTML)
 * [Bible of JS](https://sheryians.com/download/bibleofjs_by_sheryians) - Harsh Sharma, Sheryians Coding School
-* [Book of Modern Frontend Tooling](https://github.com/tooling/book-of-modern-frontend-tooling) - Various (HTML)
+* [Book of Modern Frontend Tooling](https://github.com/tooling/book-of-modern-frontend-tooling) - Various (HTML) (CC BY-NC)
 * [Building Front-End Web Apps with Plain JavaScript](https://web-engineering.info/JsFrontendApp-Book) - Gerd Wagner (HTML,PDF)
 * [Clean Code JavaScript](https://github.com/ryanmcdermott/clean-code-javascript) - Ryan McDermott (HTML)
 * [Crockford's JavaScript](http://www.crockford.com/javascript/) - Douglas Crockford (HTML)