diff --git a/css/slick.css b/css/slick.css
index 3a6dd8f..9f5559d 100755
--- a/css/slick.css
+++ b/css/slick.css
@@ -59,7 +59,10 @@
   [dir="rtl"] .slick-slide {
     float: right; }
   .slick-slide img {
-    display: block; }
+    display: block;
+    filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix  type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 3.5+ */
+  filter: gray; /* IE6-9 */
+  -webkit-filter: grayscale(100%); /* Chrome 19+ & Safari 6+ */ }
   .slick-slide:hover {
     filter: none;
     -webkit-filter: grayscale(0%); }
@@ -68,7 +71,10 @@
   .slick-slide.dragging img {
     pointer-events: none; }
   .slick-initialized .slick-slide {
-    display: block; }
+    display: block;
+    filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix  type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale"); /* Firefox 3.5+ */
+    filter: gray; /* IE6-9 */
+    -webkit-filter: grayscale(100%); /* Chrome 19+ & Safari 6+ */ }
   .slick-loading .slick-slide {
     visibility: hidden; }
   .slick-vertical .slick-slide {