diff --git a/src/style/_layout.scss b/src/style/_layout.scss
index b95839de..786b9f80 100644
--- a/src/style/_layout.scss
+++ b/src/style/_layout.scss
@@ -579,6 +579,7 @@
         th
         {
             @include text_code($response-col-description-inner-markdown-font-color);
+            border-bottom: 1px solid $response-col-description-inner-markdown-font-color;
         }
     }
 }