diff --git a/README.md b/README.md
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@@ -30,7 +30,7 @@
 * [SMS phishing](https://www.bejarano.io/sms-phishing/) is way too easy
 * [Don't!](https://gist.github.com/joepie91/5a9909939e6ce7d09e29) [*use*](https://superuser.com/a/926524) VPN services. Use [MPRs](https://invisv.com/articles/relay.html)
 * [avoid](https://blog.sekoia.io/luckymouse-uses-a-backdoored-electron-app-to-target-macos/) Electron [*based*](https://www.malwarebytes.com/blog/news/2022/08/a-vulnerability-was-found-in-electron-which-is-what-drives-discord-spotify-and-microsoft-teams) [programs](https://blog.doyensec.com/2022/09/27/electron-api-default-permissions.html)
-* [Matrix](https://archive.is/bPrxT) [*InSecurity*](https://archive.is/lqtLl) and [concerns](https://anarc.at/blog/2022-06-17-matrix-notes/)
+* [Matrix](https://archive.is/bPrxT) [*InSecurity*](https://archive.is/lqtLl), [concerns](https://anarc.at/blog/2022-06-17-matrix-notes/) and big [potential metadata issues](https://blog.erethon.com/blog/2023/06/21/what-happens-when-a-matrix-server-disappears/)
 * Phishing [with](https://mrd0x.com/phishing-with-chromium-application-mode/) Chromium's Application Mode
 * Browser in the Browser (BITB) [Attack](https://mrd0x.com/browser-in-the-browser-phishing-attack/)
 * Chrome Browser Exploitation [Part 1](https://jhalon.github.io/chrome-browser-exploitation-1/)