diff --git a/src/resources/markdown-it.js b/src/resources/markdown-it.js
index cee6ac5b..e7303eb1 100644
--- a/src/resources/markdown-it.js
+++ b/src/resources/markdown-it.js
@@ -66,6 +66,9 @@ mdit = mdit.use(window.markdownitHeadingAnchor, {
 });
 
 mdit = mdit.use(window.markdownitTaskLists);
+mdit = mdit.use(window.markdownitSub);
+mdit = mdit.use(window.markdownitSup);
+mdit = mdit.use(window.markdownitFootnote);
 
 var mdHasTocSection = function(markdown) {
     var n = markdown.search(/(\n|^)\[toc\]/i);
diff --git a/src/utils/markdown-it/markdown-it-footnote.min.js b/src/utils/markdown-it/markdown-it-footnote.min.js
new file mode 100644
index 00000000..d0271179
--- /dev/null
+++ b/src/utils/markdown-it/markdown-it-footnote.min.js
@@ -0,0 +1,2 @@
+/*! markdown-it-footnote 3.0.1 https://github.com//markdown-it/markdown-it-footnote @license MIT */
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var o;o="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,o.markdownitFootnote=e()}}(function(){return function e(o,t,n){function r(f,l){if(!t[f]){if(!o[f]){var u="function"==typeof require&&require;if(!l&&u)return u(f,!0);if(s)return s(f,!0);var i=new Error("Cannot find module '"+f+"'");throw i.code="MODULE_NOT_FOUND",i}var a=t[f]={exports:{}};o[f][0].call(a.exports,function(e){var t=o[f][1][e];return r(t?t:e)},a,a.exports,e,o,t,n)}return t[f].exports}for(var s="function"==typeof require&&require,f=0;f<n.length;f++)r(n[f]);return r}({1:[function(e,o,t){"use strict";function n(e,o,t,n){var r=Number(e[o].meta.id+1).toString(),s="";return"string"==typeof n.docId&&(s="-"+n.docId+"-"),s+r}function r(e,o){var t=Number(e[o].meta.id+1).toString();return e[o].meta.subId>0&&(t+=":"+e[o].meta.subId),"["+t+"]"}function s(e,o,t,n,r){var s=r.rules.footnote_anchor_name(e,o,t,n,r),f=r.rules.footnote_caption(e,o,t,n,r),l=s;return e[o].meta.subId>0&&(l+=":"+e[o].meta.subId),'<sup class="footnote-ref"><a href="#fn'+s+'" id="fnref'+l+'">'+f+"</a></sup>"}function f(e,o,t){return(t.xhtmlOut?'<hr class="footnotes-sep" />\n':'<hr class="footnotes-sep">\n')+'<section class="footnotes">\n<ol class="footnotes-list">\n'}function l(){return"</ol>\n</section>\n"}function u(e,o,t,n,r){var s=r.rules.footnote_anchor_name(e,o,t,n,r);return e[o].meta.subId>0&&(s+=":"+e[o].meta.subId),'<li id="fn'+s+'" class="footnote-item">'}function i(){return"</li>\n"}function a(e,o,t,n,r){var s=r.rules.footnote_anchor_name(e,o,t,n,r);return e[o].meta.subId>0&&(s+=":"+e[o].meta.subId),' <a href="#fnref'+s+'" class="footnote-backref">\u21a9\ufe0e</a>'}o.exports=function(e){function o(e,o,t,n){var r,s,f,l,u,i,a,c,p,d,k,b=e.bMarks[o]+e.tShift[o],v=e.eMarks[o];if(b+4>v)return!1;if(91!==e.src.charCodeAt(b))return!1;if(94!==e.src.charCodeAt(b+1))return!1;for(u=b+2;u<v;u++){if(32===e.src.charCodeAt(u))return!1;if(93===e.src.charCodeAt(u))break}if(u===b+2)return!1;if(u+1>=v||58!==e.src.charCodeAt(++u))return!1;if(n)return!0;for(u++,e.env.footnotes||(e.env.footnotes={}),e.env.footnotes.refs||(e.env.footnotes.refs={}),i=e.src.slice(b+2,u-2),e.env.footnotes.refs[":"+i]=-1,a=new e.Token("footnote_reference_open","",1),a.meta={label:i},a.level=e.level++,e.tokens.push(a),r=e.bMarks[o],s=e.tShift[o],f=e.sCount[o],l=e.parentType,k=u,c=p=e.sCount[o]+u-(e.bMarks[o]+e.tShift[o]);u<v&&(d=e.src.charCodeAt(u),h(d));)9===d?p+=4-p%4:p++,u++;return e.tShift[o]=u-k,e.sCount[o]=p-c,e.bMarks[o]=k,e.blkIndent+=4,e.parentType="footnote",e.sCount[o]<e.blkIndent&&(e.sCount[o]+=e.blkIndent),e.md.block.tokenize(e,o,t,!0),e.parentType=l,e.blkIndent-=4,e.tShift[o]=s,e.sCount[o]=f,e.bMarks[o]=r,a=new e.Token("footnote_reference_close","",(-1)),a.level=--e.level,e.tokens.push(a),!0}function t(e,o){var t,n,r,s,f,l=e.posMax,u=e.pos;return!(u+2>=l)&&(94===e.src.charCodeAt(u)&&(91===e.src.charCodeAt(u+1)&&(t=u+2,n=d(e,u+1),!(n<0)&&(o||(e.env.footnotes||(e.env.footnotes={}),e.env.footnotes.list||(e.env.footnotes.list=[]),r=e.env.footnotes.list.length,e.md.inline.parse(e.src.slice(t,n),e.md,e.env,f=[]),s=e.push("footnote_ref","",0),s.meta={id:r},e.env.footnotes.list[r]={tokens:f}),e.pos=n+1,e.posMax=l,!0))))}function c(e,o){var t,n,r,s,f,l=e.posMax,u=e.pos;if(u+3>l)return!1;if(!e.env.footnotes||!e.env.footnotes.refs)return!1;if(91!==e.src.charCodeAt(u))return!1;if(94!==e.src.charCodeAt(u+1))return!1;for(n=u+2;n<l;n++){if(32===e.src.charCodeAt(n))return!1;if(10===e.src.charCodeAt(n))return!1;if(93===e.src.charCodeAt(n))break}return n!==u+2&&(!(n>=l)&&(n++,t=e.src.slice(u+2,n-1),"undefined"!=typeof e.env.footnotes.refs[":"+t]&&(o||(e.env.footnotes.list||(e.env.footnotes.list=[]),e.env.footnotes.refs[":"+t]<0?(r=e.env.footnotes.list.length,e.env.footnotes.list[r]={label:t,count:0},e.env.footnotes.refs[":"+t]=r):r=e.env.footnotes.refs[":"+t],s=e.env.footnotes.list[r].count,e.env.footnotes.list[r].count++,f=e.push("footnote_ref","",0),f.meta={id:r,subId:s,label:t}),e.pos=n,e.posMax=l,!0)))}function p(e){var o,t,n,r,s,f,l,u,i,a,c=!1,p={};if(e.env.footnotes&&(e.tokens=e.tokens.filter(function(e){return"footnote_reference_open"===e.type?(c=!0,i=[],a=e.meta.label,!1):"footnote_reference_close"===e.type?(c=!1,p[":"+a]=i,!1):(c&&i.push(e),!c)}),e.env.footnotes.list)){for(f=e.env.footnotes.list,l=new e.Token("footnote_block_open","",1),e.tokens.push(l),o=0,t=f.length;o<t;o++){for(l=new e.Token("footnote_open","",1),l.meta={id:o,label:f[o].label},e.tokens.push(l),f[o].tokens?(u=[],l=new e.Token("paragraph_open","p",1),l.block=!0,u.push(l),l=new e.Token("inline","",0),l.children=f[o].tokens,l.content="",u.push(l),l=new e.Token("paragraph_close","p",(-1)),l.block=!0,u.push(l)):f[o].label&&(u=p[":"+f[o].label]),e.tokens=e.tokens.concat(u),s="paragraph_close"===e.tokens[e.tokens.length-1].type?e.tokens.pop():null,r=f[o].count>0?f[o].count:1,n=0;n<r;n++)l=new e.Token("footnote_anchor","",0),l.meta={id:o,subId:n,label:f[o].label},e.tokens.push(l);s&&e.tokens.push(s),l=new e.Token("footnote_close","",(-1)),e.tokens.push(l)}l=new e.Token("footnote_block_close","",(-1)),e.tokens.push(l)}}var d=e.helpers.parseLinkLabel,h=e.utils.isSpace;e.renderer.rules.footnote_ref=s,e.renderer.rules.footnote_block_open=f,e.renderer.rules.footnote_block_close=l,e.renderer.rules.footnote_open=u,e.renderer.rules.footnote_close=i,e.renderer.rules.footnote_anchor=a,e.renderer.rules.footnote_caption=r,e.renderer.rules.footnote_anchor_name=n,e.block.ruler.before("reference","footnote_def",o,{alt:["paragraph","reference"]}),e.inline.ruler.after("image","footnote_inline",t),e.inline.ruler.after("footnote_inline","footnote_ref",c),e.core.ruler.after("inline","footnote_tail",p)}},{}]},{},[1])(1)});
diff --git a/src/utils/markdown-it/markdown-it-sub.min.js b/src/utils/markdown-it/markdown-it-sub.min.js
new file mode 100644
index 00000000..a3a4542f
--- /dev/null
+++ b/src/utils/markdown-it/markdown-it-sub.min.js
@@ -0,0 +1,2 @@
+/*! markdown-it-sub 1.0.0 https://github.com//markdown-it/markdown-it-sub @license MIT */
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var r;r="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,r.markdownitSub=e()}}(function(){return function e(r,o,n){function t(i,u){if(!o[i]){if(!r[i]){var f="function"==typeof require&&require;if(!u&&f)return f(i,!0);if(s)return s(i,!0);var p=new Error("Cannot find module '"+i+"'");throw p.code="MODULE_NOT_FOUND",p}var a=o[i]={exports:{}};r[i][0].call(a.exports,function(e){var o=r[i][1][e];return t(o?o:e)},a,a.exports,e,r,o,n)}return o[i].exports}for(var s="function"==typeof require&&require,i=0;i<n.length;i++)t(n[i]);return t}({1:[function(e,r){"use strict";function o(e,r){var o,t,s,i=e.posMax,u=e.pos;if(126!==e.src.charCodeAt(u))return!1;if(r)return!1;if(u+2>=i)return!1;for(e.pos=u+1;e.pos<i;){if(126===e.src.charCodeAt(e.pos)){o=!0;break}e.md.inline.skipToken(e)}return o&&u+1!==e.pos?(t=e.src.slice(u+1,e.pos),t.match(/(^|[^\\])(\\\\)*\s/)?(e.pos=u,!1):(e.posMax=e.pos,e.pos=u+1,s=e.push("sub_open","sub",1),s.markup="~",s=e.push("text","",0),s.content=t.replace(n,"$1"),s=e.push("sub_close","sub",-1),s.markup="~",e.pos=e.posMax+1,e.posMax=i,!0)):(e.pos=u,!1)}var n=/\\([ \\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;r.exports=function(e){e.inline.ruler.after("emphasis","sub",o)}},{}]},{},[1])(1)});
\ No newline at end of file
diff --git a/src/utils/markdown-it/markdown-it-sup.min.js b/src/utils/markdown-it/markdown-it-sup.min.js
new file mode 100644
index 00000000..67da65cd
--- /dev/null
+++ b/src/utils/markdown-it/markdown-it-sup.min.js
@@ -0,0 +1,2 @@
+/*! markdown-it-sup 1.0.0 https://github.com//markdown-it/markdown-it-sup @license MIT */
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var r;r="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,r.markdownitSup=e()}}(function(){return function e(r,o,n){function t(i,p){if(!o[i]){if(!r[i]){var u="function"==typeof require&&require;if(!p&&u)return u(i,!0);if(s)return s(i,!0);var f=new Error("Cannot find module '"+i+"'");throw f.code="MODULE_NOT_FOUND",f}var a=o[i]={exports:{}};r[i][0].call(a.exports,function(e){var o=r[i][1][e];return t(o?o:e)},a,a.exports,e,r,o,n)}return o[i].exports}for(var s="function"==typeof require&&require,i=0;i<n.length;i++)t(n[i]);return t}({1:[function(e,r){"use strict";function o(e,r){var o,t,s,i=e.posMax,p=e.pos;if(94!==e.src.charCodeAt(p))return!1;if(r)return!1;if(p+2>=i)return!1;for(e.pos=p+1;e.pos<i;){if(94===e.src.charCodeAt(e.pos)){o=!0;break}e.md.inline.skipToken(e)}return o&&p+1!==e.pos?(t=e.src.slice(p+1,e.pos),t.match(/(^|[^\\])(\\\\)*\s/)?(e.pos=p,!1):(e.posMax=e.pos,e.pos=p+1,s=e.push("sup_open","sup",1),s.markup="^",s=e.push("text","",0),s.content=t.replace(n,"$1"),s=e.push("sup_close","sup",-1),s.markup="^",e.pos=e.posMax+1,e.posMax=i,!0)):(e.pos=p,!1)}var n=/\\([ \\!"#$%&'()*+,.\/:;<=>?@[\]^_`{|}~-])/g;r.exports=function(e){e.inline.ruler.after("emphasis","sup",o)}},{}]},{},[1])(1)});
\ No newline at end of file
diff --git a/src/vmdtab.cpp b/src/vmdtab.cpp
index d6aec63b..93f10230 100644
--- a/src/vmdtab.cpp
+++ b/src/vmdtab.cpp
@@ -300,7 +300,10 @@ QString VMdTab::fillHtmlTemplate() const
         jsFile = "qrc" + VNote::c_markdownitJsFile;
         extraFile = "<script src=\"qrc" + VNote::c_markdownitExtraFile + "\"></script>\n" +
                     "<script src=\"qrc" + VNote::c_markdownitAnchorExtraFile + "\"></script>\n" +
-                    "<script src=\"qrc" + VNote::c_markdownitTaskListExtraFile + "\"></script>\n";
+                    "<script src=\"qrc" + VNote::c_markdownitTaskListExtraFile + "\"></script>\n" +
+                    "<script src=\"qrc" + VNote::c_markdownitSubExtraFile + "\"></script>\n" +
+                    "<script src=\"qrc" + VNote::c_markdownitSupExtraFile + "\"></script>\n" +
+                    "<script src=\"qrc" + VNote::c_markdownitFootnoteExtraFile + "\"></script>\n";
         break;
 
     case MarkdownConverterType::Showdown:
diff --git a/src/vnote.cpp b/src/vnote.cpp
index f4db89e0..4f115e15 100644
--- a/src/vnote.cpp
+++ b/src/vnote.cpp
@@ -19,12 +19,18 @@ QString VNote::s_markdownTemplate;
 QString VNote::s_markdownTemplatePDF;
 
 const QString VNote::c_hoedownJsFile = ":/resources/hoedown.js";
+
 const QString VNote::c_markedJsFile = ":/resources/marked.js";
 const QString VNote::c_markedExtraFile = ":/utils/marked/marked.min.js";
+
 const QString VNote::c_markdownitJsFile = ":/resources/markdown-it.js";
 const QString VNote::c_markdownitExtraFile = ":/utils/markdown-it/markdown-it.min.js";
 const QString VNote::c_markdownitAnchorExtraFile = ":/utils/markdown-it/markdown-it-headinganchor.js";
 const QString VNote::c_markdownitTaskListExtraFile = ":/utils/markdown-it/markdown-it-task-lists.min.js";
+const QString VNote::c_markdownitSubExtraFile = ":/utils/markdown-it/markdown-it-sub.min.js";
+const QString VNote::c_markdownitSupExtraFile = ":/utils/markdown-it/markdown-it-sup.min.js";
+const QString VNote::c_markdownitFootnoteExtraFile = ":/utils/markdown-it/markdown-it-footnote.min.js";
+
 const QString VNote::c_showdownJsFile = ":/resources/showdown.js";
 const QString VNote::c_showdownExtraFile = ":/utils/showdown/showdown.min.js";
 const QString VNote::c_showdownAnchorExtraFile = ":/utils/showdown/showdown-headinganchor.js";
@@ -33,7 +39,9 @@ const QString VNote::c_mermaidApiJsFile = ":/utils/mermaid/mermaidAPI.min.js";
 const QString VNote::c_mermaidCssFile = ":/utils/mermaid/mermaid.css";
 const QString VNote::c_mermaidDarkCssFile = ":/utils/mermaid/mermaid.dark.css";
 const QString VNote::c_mermaidForestCssFile = ":/utils/mermaid/mermaid.forest.css";
+
 const QString VNote::c_mathjaxJsFile = "https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML";
+
 const QString VNote::c_shortcutsDocFile_en = ":/resources/docs/shortcuts_en.md";
 const QString VNote::c_shortcutsDocFile_zh = ":/resources/docs/shortcuts_zh.md";
 
diff --git a/src/vnote.h b/src/vnote.h
index 4239ad3d..e8055def 100644
--- a/src/vnote.h
+++ b/src/vnote.h
@@ -42,6 +42,9 @@ public:
     static const QString c_markdownitExtraFile;
     static const QString c_markdownitAnchorExtraFile;
     static const QString c_markdownitTaskListExtraFile;
+    static const QString c_markdownitSubExtraFile;
+    static const QString c_markdownitSupExtraFile;
+    static const QString c_markdownitFootnoteExtraFile;
 
     // Showdown
     static const QString c_showdownJsFile;
diff --git a/src/vnote.qrc b/src/vnote.qrc
index 4fd24960..10147262 100644
--- a/src/vnote.qrc
+++ b/src/vnote.qrc
@@ -105,5 +105,8 @@
         <file>resources/showdown.js</file>
         <file>utils/showdown/showdown-headinganchor.js</file>
         <file>resources/icons/print.svg</file>
+        <file>utils/markdown-it/markdown-it-sub.min.js</file>
+        <file>utils/markdown-it/markdown-it-sup.min.js</file>
+        <file>utils/markdown-it/markdown-it-footnote.min.js</file>
     </qresource>
 </RCC>