diff --git a/package.json b/package.json
index 9bae4f52..445f2a0f 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "graceful-fs": "^4.1.11",
     "handlebars": "^4.0.6",
     "helmet": "^3.3.0",
-    "highlight.js": "~9.9.0",
+    "highlight.js": "~9.12.0",
     "i18n": "^0.8.3",
     "imgur": "git+https://github.com/hackmdio/node-imgur.git",
     "ionicons": "~2.0.1",
diff --git a/public/views/codimd/foot.ejs b/public/views/codimd/foot.ejs
index 4d73d05f..000ccb6d 100644
--- a/public/views/codimd/foot.ejs
+++ b/public/views/codimd/foot.ejs
@@ -14,7 +14,7 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.2/lodash.min.js" integrity="sha256-Cv5v4i4SuYvwRYzIONifZjoc99CkwfncROMSWat1cVA=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.0.4/socket.io.js" integrity="sha256-WPeFPWD3PZQUDrpFnDM1N2KadNVwCfNS4cCZ78b76T8=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.6/handlebars.min.js" integrity="sha256-1O3BtOwnPyyRzOszK6P+gqaRoXHV6JXj8HkjZmPYhCI=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.9.0/highlight.min.js" integrity="sha256-KbfTjB0WZ8vvXngdpJGY3Yp3xKk+tttbqClO11anCIU=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/gist-embed/2.6.0/gist-embed.min.js" integrity="sha256-KyF2D6xPIJUW5sUDSs93vWyZm+1RzIpKCexxElmxl8g=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/1.7.0/viz.js" integrity="sha256-8t+rndrF+TU4JtelmOH1lDHTMe2ovhO2UbzDArp5lY8=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/1000hz-bootstrap-validator/0.11.8/validator.min.js" integrity="sha256-LHeY7YoYJ0SSXbCx7sR14Pqna+52moaH3bhv0Mjzd/M=" crossorigin="anonymous" defer></script>
diff --git a/public/views/html.hbs b/public/views/html.hbs
index e3d557f9..a87bf81a 100644
--- a/public/views/html.hbs
+++ b/public/views/html.hbs
@@ -20,7 +20,7 @@
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ionicons/2.0.1/css/ionicons.min.css" integrity="sha256-3iu9jgsy9TpTwXKb7bNQzqWekRX7pPK+2OLj3R922fo=" crossorigin="anonymous" />
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/octicons/4.4.0/octicons.min.css" integrity="sha256-4eCms8tUm+iL29tUvmRhNRnz/7lNI4oTtQzqa/uM2dI=" crossorigin="anonymous" />
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.5.1/themes/prism.min.css" integrity="sha256-vtR0hSWRc3Tb26iuN2oZHt3KRUomwTufNIf5/4oeCyg=" crossorigin="anonymous" />
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/styles/github-gist.min.css" integrity="sha256-tAflq+ymku3Khs+I/WcAneIlafYgDiOQ9stIHH985Wo=" crossorigin="anonymous" />
+    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/github-gist.min.css" integrity="sha256-tAflq+ymku3Khs+I/WcAneIlafYgDiOQ9stIHH985Wo=" crossorigin="anonymous" />
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/emojify.js/1.1.0/css/basic/emojify.min.css" integrity="sha256-UOrvMOsSDSrW6szVLe8ZDZezBxh5IoIfgTwdNDgTjiU=" crossorigin="anonymous" />
     <style>
         {{{css}}}
diff --git a/public/views/pretty.ejs b/public/views/pretty.ejs
index 885844bc..4c2fc0ab 100644
--- a/public/views/pretty.ejs
+++ b/public/views/pretty.ejs
@@ -85,7 +85,7 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/7.1.0/mermaid.min.js" integrity="sha256-M3OC0Q6g4/+Q4j73OvnsnA+lMkdAE5KgupRHqTiPbnI=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/emojify.js/1.1.0/js/emojify.min.js" integrity="sha256-VAB5tAlKBvgaxw8oJ1crWMVbdmBVl4mP/2M8MNRl+4E=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.6/handlebars.min.js" integrity="sha256-1O3BtOwnPyyRzOszK6P+gqaRoXHV6JXj8HkjZmPYhCI=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.9.0/highlight.min.js" integrity="sha256-KbfTjB0WZ8vvXngdpJGY3Yp3xKk+tttbqClO11anCIU=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/gist-embed/2.6.0/gist-embed.min.js" integrity="sha256-KyF2D6xPIJUW5sUDSs93vWyZm+1RzIpKCexxElmxl8g=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/1.7.0/viz.js" integrity="sha256-8t+rndrF+TU4JtelmOH1lDHTMe2ovhO2UbzDArp5lY8=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/abcjs/3.1.1/abcjs_basic-min.js" integrity="sha256-Sq1r2XXWXQoShQKsS0Wrf5r7fRkErd9Fat9vHYeU68s=" crossorigin="anonymous"></script>
diff --git a/public/views/slide.ejs b/public/views/slide.ejs
index 8f66bf5d..c11d2984 100644
--- a/public/views/slide.ejs
+++ b/public/views/slide.ejs
@@ -101,7 +101,7 @@
         <script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/7.1.0/mermaid.min.js" integrity="sha256-M3OC0Q6g4/+Q4j73OvnsnA+lMkdAE5KgupRHqTiPbnI=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/emojify.js/1.1.0/js/emojify.min.js" integrity="sha256-VAB5tAlKBvgaxw8oJ1crWMVbdmBVl4mP/2M8MNRl+4E=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.6/handlebars.min.js" integrity="sha256-1O3BtOwnPyyRzOszK6P+gqaRoXHV6JXj8HkjZmPYhCI=" crossorigin="anonymous" defer></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.9.0/highlight.min.js" integrity="sha256-KbfTjB0WZ8vvXngdpJGY3Yp3xKk+tttbqClO11anCIU=" crossorigin="anonymous" defer></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/gist-embed/2.6.0/gist-embed.min.js" integrity="sha256-KyF2D6xPIJUW5sUDSs93vWyZm+1RzIpKCexxElmxl8g=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/1.7.0/viz.js" integrity="sha256-8t+rndrF+TU4JtelmOH1lDHTMe2ovhO2UbzDArp5lY8=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/abcjs/3.1.1/abcjs_basic-min.js" integrity="sha256-Sq1r2XXWXQoShQKsS0Wrf5r7fRkErd9Fat9vHYeU68s=" crossorigin="anonymous"></script>