diff --git a/src/ChromeHeadless.php b/src/ChromeHeadless.php
index 366b1c4..72af42a 100644
--- a/src/ChromeHeadless.php
+++ b/src/ChromeHeadless.php
@@ -2,6 +2,7 @@
 
 namespace ChromeHeadless;
 
+use ChromeHeadless\Exceptions\CloudflareProtection;
 use Symfony\Component\Process\Process;
 use Symfony\Component\DomCrawler\Crawler;
 use ChromeHeadless\Exceptions\EmptyDocument;
@@ -59,6 +60,10 @@ public function setHtml(string $html)
             throw new EmptyDocument($this->url);
         }
 
+        if (strpos($html, 'cf-browser-verification cf-im-under-attack') !== false) {
+            throw new CloudflareProtection($this->url);
+        }
+
         $this->html = $html;
 
         return $this;
diff --git a/src/Exceptions/CloudflareProtection.php b/src/Exceptions/CloudflareProtection.php
new file mode 100644
index 0000000..627ccef
--- /dev/null
+++ b/src/Exceptions/CloudflareProtection.php
@@ -0,0 +1,13 @@
+<?php
+
+namespace ChromeHeadless\Exceptions;
+
+use Exception;
+
+class CloudflareProtection extends Exception
+{
+    public function __construct($url)
+    {
+        parent::__construct("Could not get `${url}`. This website is protected by Cloudflare.");
+    }
+}