diff --git a/Web Sockets/README.md b/Web Sockets/README.md
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 ## References
 
-- [HACKING WEB SOCKETS: ALL WEB PENTEST TOOLS WELCOMED by Michael Fowl | Mar 5, 2019](https://www.vdalabs.com/2019/03/05/hacking-web-sockets-all-web-pentest-tools-welcomed/)
+- [HACKING WEB SOCKETS: ALL WEB PENTEST TOOLS WELCOMED by Michael Fowl | Mar 5, 2019](https://web.archive.org/web/20190306170840/https://www.vdalabs.com/2019/03/05/hacking-web-sockets-all-web-pentest-tools-welcomed/)
 - [Hacking with WebSockets - Qualys - Mike Shema, Sergey Shekyan, Vaagn Toukharian](https://media.blackhat.com/bh-us-12/Briefings/Shekyan/BH_US_12_Shekyan_Toukharian_Hacking_Websocket_Slides.pdf)
 - [Mini WebSocket CTF - January 27, 2020 - Snowscan](https://snowscan.io/bbsctf-evilconneck/#)
+- [Hacktricks - CSWSH](https://book.hacktricks.xyz/pentesting-web/cross-site-websocket-hijacking-cswsh)