diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index df4dc7ff28..2a4b693875 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 71ab7a9d4e..832ea64b52 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -1581,7 +1581,6 @@ table .span12 {
   float: left;
   display: none;
   min-width: 160px;
-  _width: 160px;
   padding: 4px 0;
   margin: 0;
   list-style: none;
diff --git a/less/dropdowns.less b/less/dropdowns.less
index 1b445844c7..88a7462c46 100644
--- a/less/dropdowns.less
+++ b/less/dropdowns.less
@@ -46,7 +46,6 @@
   float: left;
   display: none; // none by default, but block on "open" of the menu
   min-width: 160px;
-  _width: 160px;
   padding: 4px 0;
   margin: 0; // override default ul
   list-style: none;