diff --git a/docs/browser.md b/docs/browser.md
index 17b9b505..dfcf8acb 100644
--- a/docs/browser.md
+++ b/docs/browser.md
@@ -41,10 +41,15 @@ ECMAScript module is also available:
 ```html
 <script type="module" type="text/javascript">
     import katex from 'https://cdn.jsdelivr.net/npm/katex@0.10.0-beta/dist/katex.mjs';
+    ...
 </script>
+<script nomodule defer src="https://cdn.jsdelivr.net/npm/katex@0.10.0-beta/dist/katex.js" integrity="sha384-omQnemkEC7UFlIZ175SaCJSWuRHhTjsVtJqXKshMhaJ7OLmAaWmbgLU5TrGGQISk" crossorigin="anonymous"></script>
 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.0-beta/dist/katex.css" integrity="sha384-9tPv11A+glH/on/wEu99NVwDPwkMQESOocs/ZGXPoIiLE8MU/qkqUcZ3zzL+6DuH" crossorigin="anonymous">
 ```
 
+> Use [`nomodule` attribute](https://developer.mozilla.org/en/HTML/Element/script#Attributes)
+to provide a fallback for older browsers that do not support ES modules.
+
 ## Download & Host Things Yourself
 Download a [KaTeX release](https://github.com/Khan/KaTeX/releases),
 copy `katex.js`, `katex.css`