diff --git a/index.html b/index.html
index fc6a86e..014d4c3 100644
--- a/index.html
+++ b/index.html
@@ -9,7 +9,8 @@
         crossorigin="anonymous">
     <link rel="stylesheet"
         href="css/index.min.css"
-        crossorigin="anonymous"/>
+        integrity="sha384-6N5QXFiNi0Dxhi0OdN6AGW3PKtsxYeAxsVhf5lNgxx6F6KO08DBr5IhVMrc3rmov"
+        crossorigin="anonymous">
 </head>
 <body onload='particles(avoidMouse=false, speed=15)'>
     <div class="wrapper">
