diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index ed52bb8304..6532a299b1 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 1391ad41ea..e32d2b13c5 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -1732,7 +1732,6 @@ table .span12 {
   box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
   background-color: #e6e6e6;
   background-color: #d9d9d9 \9;
-  color: rgba(0, 0, 0, 0.5);
   outline: 0;
 }
 .btn.disabled, .btn[disabled] {
diff --git a/less/buttons.less b/less/buttons.less
index 880d1f64a4..0dc9e374bb 100644
--- a/less/buttons.less
+++ b/less/buttons.less
@@ -53,7 +53,6 @@
   .box-shadow(@shadow);
   background-color: darken(@white, 10%);
   background-color: darken(@white, 15%) e("\9");
-  color: rgba(0,0,0,.5);
   outline: 0;
 }