diff --git a/lib/xss.js b/lib/xss.js
index 1ab08576..b8a379e9 100644
--- a/lib/xss.js
+++ b/lib/xss.js
@@ -11,6 +11,7 @@ const ALLOWED_TAGS = [
     "h2",
     "img",
     "marquee", // It pains me to do this, but a lot of people use it...
+    "s",
     "section",
     "span",
     "summary"