diff --git a/README.md b/README.md
index bca3c71..d396402 100644
--- a/README.md
+++ b/README.md
@@ -36,3 +36,4 @@ Tikz diagrams
   * [tikz.dev](https://tikz.dev/tutorials-guidelines)
   * [tikz.netlify.app](https://tikz.netlify.app/)
   * [relative `positioning` library](https://rmwu.github.io/tutorial/latex/2019/11/21/positioning/#relative-positioning)
+  * [svg backgrounds](https://www.svgbackgrounds.com/)