diff --git a/lib/utils/html-elements.json b/lib/utils/html-elements.json
index 829b6f841..ea94fc647 100644
--- a/lib/utils/html-elements.json
+++ b/lib/utils/html-elements.json
@@ -74,7 +74,6 @@
   "output",
   "p",
   "picture",
-  "portal",
   "pre",
   "progress",
   "q",
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",