diff --git a/docs/content/extras/shortcodes.md b/docs/content/extras/shortcodes.md
index 8cf24c9c5..ecb087082 100644
--- a/docs/content/extras/shortcodes.md
+++ b/docs/content/extras/shortcodes.md
@@ -112,6 +112,7 @@ closing shortcode.
  * link
  * title
  * caption
+ * class
  * attr (attribution)
  * attrlink
  * alt