diff --git a/assets/_custom.scss b/assets/_custom.scss
index 0ed45bd..067f94c 100644
--- a/assets/_custom.scss
+++ b/assets/_custom.scss
@@ -36,3 +36,7 @@
 summary:focus {
 	outline: none;
 }
+
+.markdown table th {
+	background: var(--gray-100);
+}