diff --git a/package.json b/package.json
index 1cef2ec3..d1e0fb2d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@matters/matters-editor",
-  "version": "0.2.0-alpha.47",
+  "version": "0.2.0-alpha.48",
   "description": "Editor for matters.news",
   "author": "https://github.com/thematters",
   "homepage": "https://github.com/thematters/matters-editor",
diff --git a/src/transformers/normalize.ts b/src/transformers/normalize.ts
index 926d2b08..8f25aec6 100644
--- a/src/transformers/normalize.ts
+++ b/src/transformers/normalize.ts
@@ -3,6 +3,7 @@ import { getSchema } from '@tiptap/core'
 import { DOMParser, DOMSerializer, Node } from '@tiptap/pm/model'
 import { createHTMLDocument, parseHTML, VHTMLDocument } from 'zeed-dom'
 import {
+  Mention,
   makeArticleEditorExtensions,
   makeCommentEditorExtensions,
 } from '../editors/extensions'
@@ -29,12 +30,12 @@ export const makeNormalizer = (extensions: Extensions) => {
 
 export const normalizeArticleHTML = (html: string): string => {
   const extensions = makeArticleEditorExtensions({})
-  const normalizer = makeNormalizer(extensions)
+  const normalizer = makeNormalizer([...extensions, Mention])
   return normalizer(html)
 }
 
 export const normalizeCommentHTML = (html: string): string => {
   const extensions = makeCommentEditorExtensions({})
-  const normalizer = makeNormalizer(extensions)
+  const normalizer = makeNormalizer([...extensions, Mention])
   return normalizer(html)
 }
diff --git a/src/transformers/options.ts b/src/transformers/options.ts
index 53f168aa..caca6164 100644
--- a/src/transformers/options.ts
+++ b/src/transformers/options.ts
@@ -67,7 +67,7 @@ export const rehypeSanitizeOptions:
   },
   attributes: {
     ...defaultSchema.attributes,
-    a: ['href', 'ref', 'target'],
+    a: ['href', 'ref', 'target', 'className', 'data*'],
     img: ['src', 'srcSet', 'data*'],
     audio: ['controls', 'data*', ['preload', 'metadata']],
     source: ['src', 'type', 'data*'],