diff --git a/devGuide/STYLELINT.md b/devGuide/STYLELINT.md
index 7d2a3a0eb..a5c89939d 100644
--- a/devGuide/STYLELINT.md
+++ b/devGuide/STYLELINT.md
@@ -6,11 +6,16 @@ Apply Stylelint to your project's CSS with the following steps:
 
 1. **NPM Script**
 
+   - Add Stylelint & stylistic/stylelint-plugin
+     ```bash
+     npm install --save-dev stylelint stylelint-config-standard
+     npm install --save-dev @stylistic/stylelint-plugin
+     ```
    - Add a script entry to your `package.json`:
      ```jsonc
      {
        "scripts": {
-         "lint:css": "stylelint \"stirling-pdf/src/main/**/*.css\""
+         "lint:css": "stylelint \"stirling-pdf/src/main/**/*.css\" \"proprietary/src/main/resources/static/css/*.css\" --fix"
        }
      }
      ```
@@ -23,7 +28,7 @@ Apply Stylelint to your project's CSS with the following steps:
 
    - Lint all CSS files:
      ```bash
-     npx stylelint "stirling-pdf/src/main/**/*.css"
+     npx stylelint "stylelint \"stirling-pdf/src/main/**/*.css\" \"proprietary/src/main/resources/static/css/*.css\""
      ```
    - Lint a single file:
      ```bash
@@ -31,7 +36,7 @@ Apply Stylelint to your project's CSS with the following steps:
      ```
    - Apply automatic fixes:
      ```bash
-     npx stylelint "stirling-pdf/src/main/**/*.css" --fix
+     npx stylelint "stirling-pdf/src/main/**/*.css" "proprietary/src/main/resources/static/css/*.css" --fix
      ```
 
 For full configuration options and rule customization, refer to the official documentation: [https://stylelint.io](https://stylelint.io)