diff --git a/src/muya/lib/parser/render/renderBlock/renderLeafBlock.js b/src/muya/lib/parser/render/renderBlock/renderLeafBlock.js
index 65ce30df..2b5fb25d 100644
--- a/src/muya/lib/parser/render/renderBlock/renderLeafBlock.js
+++ b/src/muya/lib/parser/render/renderBlock/renderLeafBlock.js
@@ -1,4 +1,5 @@
 import katex from 'katex'
+import 'katex/dist/contrib/mhchem.min.js'
 import prism, { loadedCache, transfromAliasToOrigin } from '../../../prism/'
 import { CLASS_OR_ID, DEVICE_MEMORY, PREVIEW_DOMPURIFY_CONFIG, HAS_TEXT_BLOCK_REG } from '../../../config'
 import { tokenizer } from '../../'
diff --git a/src/muya/lib/parser/render/renderInlines/inlineMath.js b/src/muya/lib/parser/render/renderInlines/inlineMath.js
index 49d4fde2..c3eb4be2 100644
--- a/src/muya/lib/parser/render/renderInlines/inlineMath.js
+++ b/src/muya/lib/parser/render/renderInlines/inlineMath.js
@@ -1,4 +1,5 @@
 import katex from 'katex'
+import 'katex/dist/contrib/mhchem.min.js'
 import { CLASS_OR_ID } from '../../../config'
 import { htmlToVNode } from '../snabbdom'
 
diff --git a/src/muya/lib/utils/exportHtml.js b/src/muya/lib/utils/exportHtml.js
index ab94e4fd..4e7802ab 100644
--- a/src/muya/lib/utils/exportHtml.js
+++ b/src/muya/lib/utils/exportHtml.js
@@ -1,6 +1,7 @@
 import marked from '../parser/marked'
 import Prism from 'prismjs'
 import katex from 'katex'
+import 'katex/dist/contrib/mhchem.min.js'
 import loadRenderer from '../renderers'
 import githubMarkdownCss from 'github-markdown-css/github-markdown.css'
 import exportStyle from '../assets/styles/exportStyle.css'