diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index d432ec49e..c46dcc287 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -1950,7 +1950,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [A Guide to Python's Magic Methods](https://github.com/RafeKettler/magicmethods) - Rafe Kettler
 * [A Practical Introduction to Python Programming](https://www.brianheinold.net/python/) - Brian Heinold (HTML, PDF, Exercises sources)
 * [A Whirlwind Tour of Python](https://jakevdp.github.io/WhirlwindTourOfPython/) - Jake VanderPlas
-* [An Introduction to Statistical Learning with Applications in Python](https://www.statlearning.com/) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani, Jonathan Taylor (PDF)
+* [An Introduction to Statistical Learning with Applications in Python](https://www.statlearning.com) - Gareth James, Daniela Witten, Trevor Hastie, Robert Tibshirani, Jonathan Taylor (PDF)
 * [Architecture Patterns with Python](https://www.cosmicpython.com/book/preface.html) - Harry J.W. Percival, Bob Gregory (HTML)
 * [Automate the Boring Stuff with Python, 2nd Edition: Practical Programming for Total Beginners](https://automatetheboringstuff.com/2e/chapter0/) - Al Sweigart (3.8)
     * [Automate the Boring Stuff with Python: Practical Programming for Total Beginners](https://automatetheboringstuff.com/chapter0/) - Al Sweigart (3.4)