diff --git a/docs/theme/docker/static/css/main.css b/docs/theme/docker/static/css/main.css
index 33ac0582ae..d64370de0c 100755
--- a/docs/theme/docker/static/css/main.css
+++ b/docs/theme/docker/static/css/main.css
@@ -82,7 +82,7 @@ h4 {
 .btn-custom {
   background-color: #292929 !important;
   background-repeat: repeat-x;
-  filter: progid:dximagetransform.microsoft.gradient(startColorstr="#515151", endColorstr="#282828");
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr="#515151", endColorstr="#282828");
   background-image: -khtml-gradient(linear, left top, left bottom, from(#515151), to(#282828));
   background-image: -moz-linear-gradient(top, #515151, #282828);
   background-image: -ms-linear-gradient(top, #515151, #282828);
diff --git a/docs/theme/docker/static/css/main.less b/docs/theme/docker/static/css/main.less
index 58b7b0d9a1..599e7883a6 100644
--- a/docs/theme/docker/static/css/main.less
+++ b/docs/theme/docker/static/css/main.less
@@ -1,5 +1,4 @@
 
-
 /* ==========================================================================
    Author's custom styles
    ========================================================================== */