diff --git a/src/content/docs/en/basics/client-side-rendering.mdx b/src/content/docs/en/basics/client-side-rendering.mdx
index 97f1aeed19dd3..fc137f8778b28 100644
--- a/src/content/docs/en/basics/client-side-rendering.mdx
+++ b/src/content/docs/en/basics/client-side-rendering.mdx
@@ -10,8 +10,11 @@ are both fine.
 
 ```html
 <script type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+<script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
 ```
 
+The `nomodule` fallback ensures the widget also loads in environments that do not execute ES module scripts (older browsers, some crawlers).
+
 Now, you can either render the Procaptcha widget implicitly or explicitly.
 
 ## Implicit Rendering
@@ -42,6 +45,7 @@ is solved.
     <head>
         <title>Procaptcha Demo</title>
         <script type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+        <script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
     </head>
     <body>
         <form action="" method="POST">
@@ -75,6 +79,12 @@ id `procaptcha-container` where the widget will be rendered.
             async
             defer
         ></script>
+        <script
+            nomodule
+            src="https://js.prosopo.io/js/procaptcha.bundle.iife.js"
+            async
+            defer
+        ></script>
     </head>
     <body>
         <div id="procaptcha-container"></div>
diff --git a/src/content/docs/en/basics/index.mdx b/src/content/docs/en/basics/index.mdx
index de4cede92e95e..c96a1e50a9bf8 100644
--- a/src/content/docs/en/basics/index.mdx
+++ b/src/content/docs/en/basics/index.mdx
@@ -44,7 +44,8 @@ To add the Procaptcha widget:
 <div>
 
 ```html
-<script src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+<script type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+<script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
 ```
 </div>
 
diff --git a/src/content/docs/en/basics/invisible-captcha.mdx b/src/content/docs/en/basics/invisible-captcha.mdx
index c7097e248ce88..4d50f99a4ff0a 100644
--- a/src/content/docs/en/basics/invisible-captcha.mdx
+++ b/src/content/docs/en/basics/invisible-captcha.mdx
@@ -76,7 +76,8 @@ Add the `procaptcha` class and data attributes directly to your form elements:
 <!DOCTYPE html>
 <html>
 <head>
-    <script src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+    <script type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+    <script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
 </head>
 <body>
     <form>
@@ -116,7 +117,8 @@ For more control over the CAPTCHA lifecycle:
 <!DOCTYPE html>
 <html>
 <head>
-    <script src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+    <script type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+    <script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
 </head>
 <body>
     <form id="demo-form">
diff --git a/src/content/docs/en/demos/client-example-bundle.mdx b/src/content/docs/en/demos/client-example-bundle.mdx
index 3552b46698cdb..b0e2d0bd95526 100644
--- a/src/content/docs/en/demos/client-example-bundle.mdx
+++ b/src/content/docs/en/demos/client-example-bundle.mdx
@@ -21,6 +21,7 @@ the [Prosopo portal](https://portal.prosopo.io).
         <link href="//cdn.muicss.com/mui-0.10.3/css/mui.min.css" rel="stylesheet" type="text/css" />
         <title>Procaptcha demo: Simple page</title>
         <script id="procaptchaScript" type="module" src="https://js.prosopo.io/js/procaptcha.bundle.js" async defer></script>
+        <script nomodule src="https://js.prosopo.io/js/procaptcha.bundle.iife.js" async defer></script>
     </head>
     <body>
         <div class="mui-container">
