diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index 8922a5c7ad..a75e75ca89 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 7babce5eb2..fa5886991d 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -565,7 +565,9 @@ input[type="image"], input[type="checkbox"], input[type="radio"] {
   line-height: normal;
   border: 0;
   cursor: pointer;
-  border-radius: 0 \0/;
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0;
 }
 input[type="file"] {
   padding: initial;
diff --git a/less/forms.less b/less/forms.less
index d70d532e8c..9c9a9b8a9f 100644
--- a/less/forms.less
+++ b/less/forms.less
@@ -86,7 +86,7 @@ input[type="radio"] {
   line-height: normal;
   border: 0;
   cursor: pointer;
-  border-radius: 0 e("\0/"); // Nuke border-radius for IE9 only
+  .border-radius(0);
 }
 
 // Reset the file input to browser defaults