diff --git a/inst/templates/knitr_bootstrap.css b/inst/templates/knitr_bootstrap.css
index 6c4cf0c..c3c88b8 100644
--- a/inst/templates/knitr_bootstrap.css
+++ b/inst/templates/knitr_bootstrap.css
@@ -19,6 +19,11 @@
 .thumbnails { text-align:center; }
 .thumbnails > .thumbnail { display: inline-block !important; float: none !important; }
 
+/*fix for boostrap#3494*/
+.row-fluid.thumbnails .span5.thumbnail:nth-child(6n+1) { margin-left: 0px; }
+.row-fluid.thumbnails .span5.thumbnail:nth-child(4n+1) { margin-left: 0px; }
+.row-fluid.thumbnails .span5.thumbnail:nth-child(2n+1) { margin-left: 0px; }
+
 /* Sticky footer styles
 -------------------------------------------------- */
 * {
diff --git a/inst/templates/knitr_bootstrap.html b/inst/templates/knitr_bootstrap.html
index a4583e4..b85658b 100644
--- a/inst/templates/knitr_bootstrap.html
+++ b/inst/templates/knitr_bootstrap.html
@@ -33,7 +33,7 @@
   "use strict";
 
   /* size of thumbnails */
-  var thumbsize = "span4";
+  var thumbsize = "span5";
 
   /* included languages */
   var languages = [];
@@ -233,6 +233,11 @@
 .thumbnails { text-align:center; }
 .thumbnails > .thumbnail { display: inline-block !important; float: none !important; }
 
+/*fix for boostrap#3494*/
+.row-fluid.thumbnails .span5.thumbnail:nth-child(6n+1) { margin-left: 0px; }
+.row-fluid.thumbnails .span5.thumbnail:nth-child(4n+1) { margin-left: 0px; }
+.row-fluid.thumbnails .span5.thumbnail:nth-child(2n+1) { margin-left: 0px; }
+
 /* Sticky footer styles
 -------------------------------------------------- */
 * {
diff --git a/inst/templates/knitr_bootstrap.js b/inst/templates/knitr_bootstrap.js
index 38ad1c5..bce4eb0 100644
--- a/inst/templates/knitr_bootstrap.js
+++ b/inst/templates/knitr_bootstrap.js
@@ -3,7 +3,7 @@ $(function() {
   "use strict";
 
   /* size of thumbnails */
-  var thumbsize = "span4";
+  var thumbsize = "span5";
 
   /* included languages */
   var languages = [];