diff --git a/public/views/codimd/foot.ejs b/public/views/codimd/foot.ejs
index dcd11302..9d620e29 100644
--- a/public/views/codimd/foot.ejs
+++ b/public/views/codimd/foot.ejs
@@ -6,16 +6,16 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.0/js/bootstrap.min.js" integrity="sha256-kJrlY+s09+QoWjpkOrXXwhxeaoDz9FW5SaxF8I0DibQ=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js" integrity="sha256-jnOjDTXIPqall8M0MyTSt98JetJuZ7Yu+1Jm7hLTF7U=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.7.0/js-yaml.min.js" integrity="sha256-8PanqYAVOGlOct+i65R+HqibK3KPsXINnrSfxN+Y/J0=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js" integrity="sha256-yYfngbEKv4RENfGDvNUqJTqGFcKf31NJEe9OTnnMH3Y=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-immzXfCGLhnx3Zfi9F/dUcqxEM8K3o3oTFy9Bh6HCwg=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/Safe.js" integrity="sha256-0ygBUDksNDXZS4vm5HMNH1a33KUu6QT1cdNTN+ZLF+4=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/MathJax.js" integrity="sha256-DViIOMYdwlM/axqoGDPeUyf0urLoHMN4QACBKyB58Uw=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-h37FgDAy5VfttFY2Jw5jcIQpvTvxY6QxTTwoDwlhg/E=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/Safe.js" integrity="sha256-y9JZetUlOMMh4hOP7XzJyCxx5xFrN4qSiBRIHfns3Dk=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment-with-locales.min.js" integrity="sha256-vvT7Ok9u6GbfnBPXnbM6FVDEO8E1kTdgHOFZOAXrktA=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.5.1/mermaid.min.js" integrity="sha256-l28DspUteK5IQ/BJAooA6UHmm/m4kYuJ4NvoeEmz3K0=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.8.2/mermaid.min.js" integrity="sha256-KqisLh8jVMBRjpNkOhH5W9VWs+F6x6vQksLqxs7+x9A=" 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/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/2.1.1/socket.io.js" integrity="sha256-ji09tECORKvr8xB9iCl8DJ8iNMLriDchC1+p+yt1hSs=" crossorigin="anonymous"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.1/socket.io.js" integrity="sha256-0FUwWDJ65tQsnnxtK/o5aTM880+kQzktw2mfTBF36Zs=" crossorigin="anonymous"></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/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.18.1/highlight.min.js" integrity="sha256-eOgo0OtLL4cdq7RdwRUiGKLX9XsIJ7nGhWEKbohmVAQ=" 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/pretty.ejs b/public/views/pretty.ejs
index 51900a4a..91a8ead2 100644
--- a/public/views/pretty.ejs
+++ b/public/views/pretty.ejs
@@ -87,14 +87,14 @@
 <script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.0/js/bootstrap.min.js" integrity="sha256-kJrlY+s09+QoWjpkOrXXwhxeaoDz9FW5SaxF8I0DibQ=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js" integrity="sha256-jnOjDTXIPqall8M0MyTSt98JetJuZ7Yu+1Jm7hLTF7U=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.7.0/js-yaml.min.js" integrity="sha256-8PanqYAVOGlOct+i65R+HqibK3KPsXINnrSfxN+Y/J0=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js" integrity="sha256-yYfngbEKv4RENfGDvNUqJTqGFcKf31NJEe9OTnnMH3Y=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-immzXfCGLhnx3Zfi9F/dUcqxEM8K3o3oTFy9Bh6HCwg=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/Safe.js" integrity="sha256-0ygBUDksNDXZS4vm5HMNH1a33KUu6QT1cdNTN+ZLF+4=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/MathJax.js" integrity="sha256-DViIOMYdwlM/axqoGDPeUyf0urLoHMN4QACBKyB58Uw=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-h37FgDAy5VfttFY2Jw5jcIQpvTvxY6QxTTwoDwlhg/E=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/Safe.js" integrity="sha256-h37FgDAy5VfttFY2Jw5jcIQpvTvxY6QxTTwoDwlhg/E=" crossorigin="anonymous" defer></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment-with-locales.min.js" integrity="sha256-vvT7Ok9u6GbfnBPXnbM6FVDEO8E1kTdgHOFZOAXrktA=" crossorigin="anonymous" defer></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.5.1/mermaid.min.js" integrity="sha256-l28DspUteK5IQ/BJAooA6UHmm/m4kYuJ4NvoeEmz3K0=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.8.2/mermaid.min.js" integrity="sha256-KqisLh8jVMBRjpNkOhH5W9VWs+F6x6vQksLqxs7+x9A=" 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/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.18.1/highlight.min.js" integrity="sha256-eOgo0OtLL4cdq7RdwRUiGKLX9XsIJ7nGhWEKbohmVAQ=" 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 9733f90a..963091a7 100644
--- a/public/views/slide.ejs
+++ b/public/views/slide.ejs
@@ -89,17 +89,16 @@
 
         <script src="<%= serverURL %>/js/mathjax-config-extra.js"></script>
         <% if(useCDN) { %>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.7.0/lib/js/head.min.js" integrity="sha256-CTcwyen1cxIrm4hlqdxe0y7Hq6B0rpxAKLiXMD3dJv0=" crossorigin="anonymous"></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.7.0/js/reveal.min.js" integrity="sha256-Xr6ZH+/kc7hDVReZLO5khBknteLqu5oen/xnSraXrVk=" crossorigin="anonymous"></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/reveal.js/3.9.2/js/reveal.js" integrity="sha512-VMwkG0MdbDSSM3wUzu6Ny450qkGMXTuBJdN1ssTZPTNWBkXxSYuvhW/o6eu7YQ2H1X2X1thKs6xdt8+obhX4Gg==" crossorigin="anonymous"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/velocity/1.4.0/velocity.min.js" integrity="sha256-bhm0lgEt6ITaZCDzZpkr/VXVrLa5RP4u9v2AYsbzSUk=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js" integrity="sha256-jnOjDTXIPqall8M0MyTSt98JetJuZ7Yu+1Jm7hLTF7U=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.7.0/js-yaml.min.js" integrity="sha256-8PanqYAVOGlOct+i65R+HqibK3KPsXINnrSfxN+Y/J0=" crossorigin="anonymous" defer></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js" integrity="sha256-yYfngbEKv4RENfGDvNUqJTqGFcKf31NJEe9OTnnMH3Y=" crossorigin="anonymous" defer></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-immzXfCGLhnx3Zfi9F/dUcqxEM8K3o3oTFy9Bh6HCwg=" crossorigin="anonymous" defer></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/config/Safe.js" integrity="sha256-0ygBUDksNDXZS4vm5HMNH1a33KUu6QT1cdNTN+ZLF+4=" crossorigin="anonymous" defer></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/MathJax.js" integrity="sha256-DViIOMYdwlM/axqoGDPeUyf0urLoHMN4QACBKyB58Uw=" crossorigin="anonymous" defer></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/TeX-AMS-MML_HTMLorMML.js" integrity="sha256-h37FgDAy5VfttFY2Jw5jcIQpvTvxY6QxTTwoDwlhg/E=" crossorigin="anonymous" defer></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.9/config/Safe.js" integrity="sha256-y9JZetUlOMMh4hOP7XzJyCxx5xFrN4qSiBRIHfns3Dk=" crossorigin="anonymous" defer></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment-with-locales.min.js" integrity="sha256-vvT7Ok9u6GbfnBPXnbM6FVDEO8E1kTdgHOFZOAXrktA=" crossorigin="anonymous" defer></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.5.1/mermaid.min.js" integrity="sha256-l28DspUteK5IQ/BJAooA6UHmm/m4kYuJ4NvoeEmz3K0=" crossorigin="anonymous" defer></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/8.8.2/mermaid.min.js" integrity="sha256-KqisLh8jVMBRjpNkOhH5W9VWs+F6x6vQksLqxs7+x9A=" 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/9.12.0/highlight.min.js" integrity="sha256-/BfiIkHlHoVihZdc6TFuj7MmJ0TWcWsMXkeDFwhi0zw=" crossorigin="anonymous" defer></script>