diff --git a/assets/site.css b/assets/site.css
index 0e52374..b5a83fa 100644
--- a/assets/site.css
+++ b/assets/site.css
@@ -598,5 +598,5 @@ pre code {
   margin-left: auto;
   background-repeat: no-repeat;
   background-position: center center;
-  background-size: 100%;
+  background-size: cover;
 }