diff --git a/README.md b/README.md
index 7a74032..2df33e3 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,14 @@ $curl->setOpt(CURLOPT_ENCODING , 'gzip');
 $curl->get('https://www.example.com/image.png');
 ```
 
+```php
+// Case-insensitive access to headers.
+$curl = new Curl();
+$curl->get('https://www.example.com/image.png');
+echo $curl->response_headers['Content-Type'] . "\n"; // image/png
+echo $curl->response_headers['CoNTeNT-TYPE'] . "\n"; // image/png
+```
+
 ```php
 $curl->close();
 ```