diff --git a/inst/htmlwidgets/lib/slick-1.8.1/slick/slick-theme.css b/inst/htmlwidgets/lib/slick-1.8.1/slick/slick-theme.css
index 1232fca..2586629 100755
--- a/inst/htmlwidgets/lib/slick-1.8.1/slick/slick-theme.css
+++ b/inst/htmlwidgets/lib/slick-1.8.1/slick/slick-theme.css
@@ -1,4 +1,4 @@
-@charset 'UTF-8';
+@charset "UTF-8";
 /* Slider */
 .slick-loading .slick-list
 {