diff --git a/README.md b/README.md
index 1273734..e6a73e7 100644
--- a/README.md
+++ b/README.md
@@ -379,3 +379,4 @@ This libre website would not have been possible without:
 - [Zola](https://getzola.org) static site generator (SSG)
 - [Gitea](https://gitea.io) forge and [git](https://git-scm.com/) VCS
 - [SASS](https://sass-lang.com/) language for our stylesheets
+- Auralinna's [CSS speech bubble](https://auralinna.blog/post/2017/how-to-make-a-css-speech-bubble-with-borders-and-drop-shadow)