diff --git a/src/DetectCMS/Systems/Concrete5.php b/src/DetectCMS/Systems/Concrete5.php
index 28818d3..c14d297 100644
--- a/src/DetectCMS/Systems/Concrete5.php
+++ b/src/DetectCMS/Systems/Concrete5.php
@@ -27,9 +27,11 @@ public function meta()
             require_once __DIR__ . '/../Thirdparty/simple_html_dom.php';
 
             $html = str_get_html($this->home_html);
-
-            if ($generator = $html->find("meta[name='generator']", false)) {
-                return stripos($generator->content, 'concrete5') !== false;
+            
+            if(!empty($html)) {
+                if ($generator = $html->find("meta[name='generator']", false)) {
+                    return stripos($generator->content, 'concrete5') !== false;
+                }
             }
         }