diff --git a/src/resources/docs/markdown_guide_en.md b/src/resources/docs/markdown_guide_en.md
index 623199d3..808543b3 100644
--- a/src/resources/docs/markdown_guide_en.md
+++ b/src/resources/docs/markdown_guide_en.md
@@ -127,13 +127,6 @@ Here is a ~~text~~ with strikethrough.
 - [ ] this is an incomplete item.
 ```
 
-### Subscript and Superscript
-```md
-This is a text with subscript H~2~o.
-
-This is a text with superscript 29^th^.
-```
-
 ### Footnote
 ```md
 This is a footnote [^1].
diff --git a/src/resources/docs/markdown_guide_zh.md b/src/resources/docs/markdown_guide_zh.md
index 9897e789..995bc80d 100644
--- a/src/resources/docs/markdown_guide_zh.md
+++ b/src/resources/docs/markdown_guide_zh.md
@@ -128,13 +128,6 @@ Here is a ~~text~~ with strikethrough.
 - [ ] this is an incomplete item.
 ```
 
-### 上标和下标
-```md
-This is a text with subscript H~2~o.
-
-This is a text with superscript 29^th^.
-```
-
 ### 脚注
 ```md
 This is a footnote [^1].
diff --git a/src/resources/markdown-it.js b/src/resources/markdown-it.js
index 1de7c0cf..ae681c0b 100644
--- a/src/resources/markdown-it.js
+++ b/src/resources/markdown-it.js
@@ -74,8 +74,10 @@ 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) {
diff --git a/src/utils/vutils.cpp b/src/utils/vutils.cpp
index dccc9685..1d6c3b2a 100644
--- a/src/utils/vutils.cpp
+++ b/src/utils/vutils.cpp
@@ -606,8 +606,10 @@ QString VUtils::generateHtmlTemplate(MarkdownConverterType p_conType, bool p_exp
         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_markdownitSubExtraFile + "\"></script>\n" +
                     "<script src=\"qrc" + VNote::c_markdownitSupExtraFile + "\"></script>\n" +
+                    */
                     "<script src=\"qrc" + VNote::c_markdownitFootnoteExtraFile + "\"></script>\n";
 
         MarkdownitOption opt = g_config->getMarkdownitOption();