diff --git a/helper.php b/helper.php
index 7127a55..93d543f 100644
--- a/helper.php
+++ b/helper.php
@@ -120,7 +120,7 @@ public static function loadContent($file)
     {
         // load file data
         if (preg_match('/^https?:\/\//i', $file)) {
-            $http = new DokuHTTPClient();
+            $http = new dokuwiki\HTTP\DokuHTTPClient();
             $content = $http->get($file);
             if ($content === false) throw new \Exception('Failed to fetch remote CSV data');