diff --git a/free-programming-books.md b/free-programming-books.md
index c3d95f216cba8a542ccdc77039ceaf5f464ff05d..ea4b56e42216ee9963a42e8d4d8ec8b8c3ded9ae 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -516,7 +516,7 @@
 * [Bits, Signals, and Packets: An Introduction to Digital Communications and Networks](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-02-introduction-to-eecs-ii-digital-communication-systems-fall-2012/readings/)
 * [Code Connected vol.1](http://hintjens.wdfiles.com/local--files/main%3Afiles/cc1pe.pdf) (PDF) (book on ZeroMQ)
 * [Computer Networking : Principles, Protocols and Practice](http://cnp3book.info.ucl.ac.be/1st/html/index.html) (HTML, ePub, PDF, Kindle)
-* [High-Performance Browser Networking](http://chimera.labs.oreilly.com/books/1230000000545/index.html)
+* [High-Performance Browser Networking](https://hpbn.co) - Ilya Grigorik
 * [HTTP Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/http) (PDF, Kindle) *(Just fill the fields with any values)*
 * [HTTP2 Explained](http://daniel.haxx.se/http2/) - Daniel Stenberg
 * [The TCP/IP Guide](http://www.tcpipguide.com/free/t_toc.htm)