diff --git a/docs/source/_assets/less/prism.less b/docs/source/_assets/less/prism.less
index bcdbe9aa3..08353d52b 100644
--- a/docs/source/_assets/less/prism.less
+++ b/docs/source/_assets/less/prism.less
@@ -59,6 +59,7 @@ pre[class*="language-"] {
 pre[class*="language-"] {
     // background: #f5f2f0;
     @apply .border;
+    @apply .border-dark-softer;
     @apply .rounded;
 }