diff --git a/tsstats/templates/index.jinja2 b/tsstats/templates/index.jinja2
index f98bbdf..c0bc9fb 100644
--- a/tsstats/templates/index.jinja2
+++ b/tsstats/templates/index.jinja2
@@ -3,7 +3,7 @@
 <head>
   <title>{{ title }}</title>
   <meta charset="utf-8">
-  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
   <link rel="stylesheet" href="https://cdn.jsdelivr.net/hint.css/2.4.1/hint.min.css" integrity="sha256-7KczUWqIa/6KaIKtNfG18eilVQR4vJ4S9SSiDAplUwc=" crossorigin="anonymous">
   <meta name="referrer" content="no-referrer">
   <meta name="viewport" content="width=device-width, initial-scale=1">
