diff --git a/hugo.toml b/hugo.toml
index 138a814..8e97826 100644
--- a/hugo.toml
+++ b/hugo.toml
@@ -18,6 +18,10 @@ theme = 'terminal'
     # start by listing h1s
     startLevel = 1
   [markup.goldmark]
+    [markup.goldmark.extensions]
+      [markup.goldmark.extensions.extras]
+        [markup.goldmark.extensions.extras.mark]
+          enable = true
     [markup.goldmark.renderer]
       unsafe = true