diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index feffa87c05..8f614f14df 100644
Binary files a/docs/assets/bootstrap.zip and b/docs/assets/bootstrap.zip differ
diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index d4d311b200..09688778b3 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -967,7 +967,7 @@ input:focus:required:invalid:focus, textarea:focus:required:invalid:focus, selec
 .control-group {
   margin-bottom: 9px;
 }
-.form-horizontal legend + .control-group {
+legend + .control-group {
   margin-top: 18px;
   -webkit-margin-top-collapse: separate;
 }