diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index 4ccab064f0..d7ffa12717 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 c70b4959fe..747fd4b552 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -2419,9 +2419,13 @@ input[type="submit"].btn.btn-mini {
 }
 .btn-large .caret {
   margin-top: 6px;
-  border-left: 5px solid transparent;
-  border-right: 5px solid transparent;
-  border-top: 5px solid #000000;
+  border-left-width: 5px;
+  border-right-width: 5px;
+  border-top-width: 5px;
+}
+.dropup .btn-large .caret {
+  border-bottom: 5px solid #000000;
+  border-top: 0;
 }
 .btn-primary .caret,
 .btn-warning .caret,
diff --git a/less/button-groups.less b/less/button-groups.less
index 627c067e7f..d28e5bbad9 100644
--- a/less/button-groups.less
+++ b/less/button-groups.less
@@ -148,7 +148,6 @@
 }
 
 
-
 // Reposition the caret
 .btn .caret {
   margin-top: 7px;
@@ -167,10 +166,16 @@
 }
 .btn-large .caret {
   margin-top: 6px;
-  border-left:  5px solid transparent;
-  border-right: 5px solid transparent;
-  border-top:   5px solid @black;
+  border-left-width:  5px;
+  border-right-width: 5px;
+  border-top-width:   5px;
 }
+// Upside down carets for .dropup
+.dropup .btn-large .caret {
+  border-bottom: 5px solid @black;
+  border-top: 0;
+}
+
 
 
 // Account for other colors