diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index 1b149b0021..5a1c831325 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 b1490bae85..16fef5042e 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -1928,6 +1928,7 @@ table .span24 {
 }
 .collapse.in {
   height: auto;
+  overflow: visible;
 }
 .close {
   float: right;
diff --git a/less/component-animations.less b/less/component-animations.less
index 4f2a4fd118..edfaef301f 100644
--- a/less/component-animations.less
+++ b/less/component-animations.less
@@ -14,5 +14,8 @@
   position:relative;
   overflow:hidden;
   height: 0;
-  &.in { height: auto; }
+  &.in {
+    height: auto;
+    overflow: visible;
+  }
 }