diff --git a/docs/guide/index.md b/docs/guide/index.md
index 6589e67..80e8528 100644
--- a/docs/guide/index.md
+++ b/docs/guide/index.md
@@ -5,6 +5,11 @@ outline: deep
 # Quickstart
 [[toc]]
 
+## Requirements
+* **Server-side library:** At least Node 14. Most modern Bun or Deno versions should work too. If you're using Glitch, make sure to set node 14 or higher in your `engines` field in `package.json`
+
+* **Client-side widget:** All modern browsers should be supported, but the build script specifically targets the last 10 versions of Chrome, Firefox, Safari and Edge.
+
 ## Client-side
 
 Start by adding importing the Cap widget library from a CDN:
diff --git a/docs/guide/server.md b/docs/guide/server.md
index 3d2c33c..97fbbd4 100644
--- a/docs/guide/server.md
+++ b/docs/guide/server.md
@@ -7,7 +7,8 @@ npm i @cap.js/server
 ```
 
 > [!NOTE]
-> It is recommended to use at least Node.js 14 or Bun 1.0.0. You might experience multiple issues on older versions of these runtimes.
+> It is recommended to use at least Node.js 14 or Bun 1.0.0. You might experience multiple issues on older versions of these runtimes.    
+> If you're using Glitch, make sure to set node 14 or higher in your `engines` field in `package.json`
 
 ## Example code
 
diff --git a/docs/guide/widget.md b/docs/guide/widget.md
index b8cda3e..3bee280 100644
--- a/docs/guide/widget.md
+++ b/docs/guide/widget.md
@@ -1,5 +1,9 @@
 # @cap.js/widget
 
+> [!NOTE]
+> **Requirements:** All modern browsers should be supported, but the build script specifically targets the last 10 versions of Chrome, Firefox, Safari and Edge.
+
+
 `@cap.js/widget` is Cap's client-side library. It includes the `cap-widget` web component, the invisible mode and the Captcha solver. It is recommended to use unpkg to install it:
 
 ```html