diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index 5d59b6d7f6..4ef9191d60 100644
Binary files a/docs/assets/bootstrap.zip and b/docs/assets/bootstrap.zip differ
diff --git a/docs/assets/css/bootstrap-responsive.css b/docs/assets/css/bootstrap-responsive.css
index a4277a26f0..780719e650 100644
--- a/docs/assets/css/bootstrap-responsive.css
+++ b/docs/assets/css/bootstrap-responsive.css
@@ -7,6 +7,16 @@
  *
  * Designed and built with all the love in the world @twitter by @mdo and @fat.
  */
+.clearfix {
+  *zoom: 1;
+}
+.clearfix:before, .clearfix:after {
+  display: table;
+  content: "";
+}
+.clearfix:after {
+  clear: both;
+}
 .hidden {
   display: none;
   visibility: hidden;
diff --git a/docs/assets/css/bootstrap.css b/docs/assets/css/bootstrap.css
index d6441d1335..74d7308be9 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -94,6 +94,16 @@ textarea {
   overflow: auto;
   vertical-align: top;
 }
+.clearfix {
+  *zoom: 1;
+}
+.clearfix:before, .clearfix:after {
+  display: table;
+  content: "";
+}
+.clearfix:after {
+  clear: both;
+}
 body {
   margin: 0;
   font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
diff --git a/less/mixins.less b/less/mixins.less
index 96af8219d8..3cf1a37040 100644
--- a/less/mixins.less
+++ b/less/mixins.less
@@ -9,7 +9,7 @@
 // Clearfix
 // --------
 // For clearing floats like a boss h5bp.com/q
-.clearfix() {
+.clearfix {
   *zoom: 1;
   &:before,
   &:after {