diff --git a/README.md b/README.md
index b923c22..333d27a 100644
--- a/README.md
+++ b/README.md
@@ -46,3 +46,45 @@ const { response } = await hcaptcha.execute({ async: true });
 | `reportapi`       | String      | No       | `-`             | See enterprise docs.                                                                                                                                      |
 | `sentry`          | Boolean     | No       | `-`             | See enterprise docs.                                                                                                                                      |
 | `custom`          | Boolean     | No       | `-`             | See enterprise docs.                                                                                                                                      |
+
+### ES5 Support
+
+To use in ES5 environments, add the following:
+
+1. **polyfills.js**: This script provides polyfills for features not supported in older browsers.
+
+```html
+<script type="text/javascript" src="./node_modules/@hcaptcha/loader/dist/polyfills.js"></script>
+```
+
+2. **index.es5.js**: This is the main script file for the `@hcaptcha/loader` package, compiled for ES5 environments.
+
+```html
+<script type="text/javascript" src="./node_modules/@hcaptcha/loader/dist/index.es5.js"></script>
+```
+
+
+Once you have included the necessary dependencies, you can use the `@hcaptcha/loader` package in your JavaScript code.
+
+```html
+<!DOCTYPE html>
+<head>
+    <script type="text/javascript" src="./node_modules/@hcaptcha/loader/dist/polyfills.js"></script>
+    <script type="text/javascript" src="./node_modules/@hcaptcha/loader/dist/index.es5.js"></script>
+</head>
+<body>
+    <div id="h-captcha" data-sitekey="YOUR_SITE_KEY"></div>
+    <script type="text/javascript">
+        var element = document.createElement('div');
+        window.hcaptcha.render(element, {
+            sitekey: 'YOUR_SITE_KEY',
+            // Additional options here
+        });
+    </script>
+</body>
+</html>
+```
+
+#### Important Notes
+
+- Ensure that the paths to the script files (`polyfills.js` and `index.es5.js`) are correct relative to your HTML file.
