diff --git a/README.md b/README.md
index a72a12d..05790d9 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,13 @@ Or test directly  in your browser with a tile URL such as: http://www.example.co
 1. **edit the default "config.php"**
 
     ```php
+    /**
+     * Public App name.
+     *
+     * @var string
+     */
+    $config['user_agent'] = 'Tile-Proxy-PHP/0.1';
+
     /**
      * Whitelist of supported tile servers
      *