diff --git a/README.md b/README.md
index 6725ef08fb476c30d1b8d90f5b67817e240564b1..23422067963564ae94cf3ddfb20b211054700ac7 100644
--- a/README.md
+++ b/README.md
@@ -30,6 +30,12 @@ your HTML files:
 <script src="//path/to/pseudocode/pseudocode.min.js"></script>
 ```
 
+Pseudocode.js uses [KaTeX](https://github.com/Khan/KaTeX) to render math 
+formulas. So if you want to include any math formulas in
+your pseudocode, make sure that [KaTeX is 
+setup](https://github.com/Khan/KaTeX#usage).
+
+
 Assume the pseudocode to be rendered is in a `<pre>` DOM element:
 ```html
 <pre id="hello-world-code" style="display:hidden;">