diff --git a/src/LogReader.php b/src/LogReader.php
index d8dfe6d..5642a09 100644
--- a/src/LogReader.php
+++ b/src/LogReader.php
@@ -47,7 +47,7 @@ class LogReader
      * bootstrap.css url
      * @var string
      */
-    private $bootstrapV3CssUrl = 'https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css';
+    private $bootstrapV3CssUrl = 'https://cdn.jsdelivr.net/npm/bootstrap@3.4.1/dist/css/bootstrap.min.css';
 
     public function __construct(string $logPath, $config = [])
     {