diff --git a/docs/assets/css/docs.css b/docs/assets/css/docs.css
index 73a3a0a..c1c8bbf 100644
--- a/docs/assets/css/docs.css
+++ b/docs/assets/css/docs.css
@@ -27,6 +27,7 @@ body {
 .docs-sub-header {
   position: relative;
   background-image: linear-gradient(45deg, #0a1855 0%, #da0024 100%);
+  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#0a1855', endColorstr='#da0024',GradientType=0 );
 }
 .docs-header:before,
 .docs-sub-header:before {