From e171c3978454ae642a9c1073ecd9d8087557b4fa Mon Sep 17 00:00:00 2001
From: Het Patel <56436879+whohet@users.noreply.github.com>
Date: Wed, 20 Oct 2021 19:32:46 +0530
Subject: [PATCH] Solution to Issue #6041 (#6341)

---
 books/free-programming-books-langs.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index ac1a69a5..60b08cba 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -521,7 +521,7 @@ That section got so big, we decided to split it into its own file, the [BY SUBJE
 
 ### Cilk
 
-* [Cilk 5.4.6 Reference Manual](http://supertech.csail.mit.edu/cilk/manual-5.4.6.pdf) (PDF)
+* [Cilk 5.4.6 Reference Manual](https://par.tuwien.ac.at/material/manual-5.4.6.pdf) (PDF)
 
 
 ### Clojure