diff --git a/docs/assets/scss/bmd/_masthead.scss b/docs/assets/scss/bmd/_masthead.scss
index ee4865be..2f4733c4 100644
--- a/docs/assets/scss/bmd/_masthead.scss
+++ b/docs/assets/scss/bmd/_masthead.scss
@@ -2,6 +2,7 @@
   background-image: linear-gradient(rgba(0, 0, 255, 0.2), rgba(0, 0, 255, 0.4)), url("../assets/img/bg.jpg");
   background-position: center top;
   background-size: cover;
+  background-attachment: fixed;
 
   .bd-booticon {
     color: #fff;