diff --git a/03-functional-programming.qmd b/03-functional-programming.qmd
index 61a8e6e..8a632e1 100644
--- a/03-functional-programming.qmd
+++ b/03-functional-programming.qmd
@@ -273,6 +273,6 @@ important there are:
 ## Further reading
 
 - [Cleaner R Code with Functional Programming](https://towardsdatascience.com/cleaner-r-code-with-functional-programming-adc37931ef7a)
-- [Functional Programming (Chapter from Advanced R)](http://adv-r.had.co.nz/Functional-programming.html)
+- [Functional Programming (Chapter from Advanced R)](https://adv-r.hadley.nz/fp.html)
 - [Why you should(n't) care about Monads if you're an R programmer](https://www.brodrigues.co/blog/2022-04-11-monads/)
 - [Some learnings from functional programming you can use to write safer programs](https://www.brodrigues.co/blog/2022-05-26-safer_programs/)