diff --git a/css/retro.css b/css/retro.css
index cfaf861..16fb160 100644
--- a/css/retro.css
+++ b/css/retro.css
@@ -313,6 +313,9 @@ td {
     vertical-align: center;
 }
 
+th {
+    border: 2px solid;
+}
 th, td {
     padding: 10px;
 }