diff --git a/packages/website/index.html b/packages/website/index.html
index 461a640a..c9df12c5 100644
--- a/packages/website/index.html
+++ b/packages/website/index.html
@@ -17,7 +17,7 @@
             href="https://fonts.googleapis.com/css2?family=DM+Mono&family=DM+Sans:ital,wght@0,400;0,700;1,400&display=swap"
             rel="stylesheet"
         />
-        <link href="https://unpkg.com/prism-themes@1.9.0/themes/prism-night-owl.css" rel="stylesheet" async />
+        <link href="https://unpkg.com/prism-themes@1.9.0/themes/prism-night-owl.css" rel="stylesheet" />
         <link href="{{ '/css/index.css' | url }}" rel="stylesheet" />
         <link href="{{ '/css/base.css' | url }}" rel="stylesheet" />