diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 2fae7281c..06e60cba3 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -203,6 +203,8 @@ defmodule Pleroma.HTML.Scrubber.Default do
   Meta.allow_tag_with_these_attributes("p", [])
   Meta.allow_tag_with_these_attributes("pre", [])
   Meta.allow_tag_with_these_attributes("strong", [])
+  Meta.allow_tag_with_these_attributes("sub", [])
+  Meta.allow_tag_with_these_attributes("sup", [])
   Meta.allow_tag_with_these_attributes("u", [])
   Meta.allow_tag_with_these_attributes("ul", [])