diff --git a/lib/utils/html-elements.json b/lib/utils/html-elements.json
index 829b6f841..ff9cdf313 100644
--- a/lib/utils/html-elements.json
+++ b/lib/utils/html-elements.json
@@ -74,7 +74,6 @@
   "output",
   "p",
   "picture",
-  "portal",
   "pre",
   "progress",
   "q",
@@ -87,6 +86,7 @@
   "search",
   "section",
   "select",
+  "selectedcontent",
   "slot",
   "small",
   "source",
diff --git a/lib/utils/svg-elements.json b/lib/utils/svg-elements.json
index f214aad24..eedbf0d07 100644
--- a/lib/utils/svg-elements.json
+++ b/lib/utils/svg-elements.json
@@ -7,6 +7,7 @@
   "clipPath",
   "defs",
   "desc",
+  "discard",
   "ellipse",
   "feBlend",
   "feColorMatrix",