diff --git a/packages/playground/data-liberation-static-files-editor/plugin.php b/packages/playground/data-liberation-static-files-editor/plugin.php
index dc64c63f1a..657f41b486 100644
--- a/packages/playground/data-liberation-static-files-editor/plugin.php
+++ b/packages/playground/data-liberation-static-files-editor/plugin.php
@@ -391,7 +391,7 @@ static public function download_file_endpoint($request) {
 
         // Set headers for file download
         header('Content-Type: application/octet-stream');
-        header('Content-Disposition: attachment; filename="' . $filename . '"');
+        header("Content-Disposition: attachment; filename=UTF-8''" . urlencode($filename));
         header('Content-Length: ' . $filesize);
         header('Cache-Control: no-cache');