diff --git a/challenges/01-front-end-development-certification/bootstrap.json b/challenges/01-front-end-development-certification/bootstrap.json
index 0209cf800d..1b88adc1ec 100644
--- a/challenges/01-front-end-development-certification/bootstrap.json
+++ b/challenges/01-front-end-development-certification/bootstrap.json
@@ -3,6 +3,9 @@
   "order": 3,
   "time": "5 hours",
   "helpRoom": "Help",
+  "required": [
+    { "link": "https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.css" }
+  ],
   "challenges": [
     {
       "id": "bad87fee1348bd9acde08712",