diff --git a/website/style.css b/website/style.css
index 4107ffa..c6479ca 100644
--- a/website/style.css
+++ b/website/style.css
@@ -16,6 +16,9 @@ code {
   max-width: 100%;
   width: 100%;
 }
+.highlight pre {
+  border: 0;
+}
 span.pl-pds { color: red; }
 span.pl-s   { color: orange; }
 span.pl-c   { color: gray; }