diff --git a/docs/assets/bootstrap.zip b/docs/assets/bootstrap.zip
index a2f11da8af..82fff3162f 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 b6d3f5b263..98ab116dd7 100644
--- a/docs/assets/css/bootstrap.css
+++ b/docs/assets/css/bootstrap.css
@@ -415,7 +415,7 @@ em {
 .muted {
   color: #999999;
 }
-abbr {
+abbr[title] {
   border-bottom: 1px dotted #ddd;
   cursor: help;
 }
diff --git a/less/type.less b/less/type.less
index ff231d9328..b68bddbb65 100644
--- a/less/type.less
+++ b/less/type.less
@@ -154,7 +154,7 @@ em {
 }
 
 // Abbreviations and acronyms
-abbr {
+abbr[title] {
   border-bottom: 1px dotted #ddd;
   cursor: help;
 }