diff --git a/package.json b/package.json
index 6b313be..1e69348 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,6 @@
     "gist-embed": "github:yukaii/gist-embed",
     "handlebars": "^4.0.5",
     "helmet": "^2.3.0",
-    "highlight.js": "^9.7.0",
     "i18n": "^0.8.3",
     "imgur": "git+https://github.com/hackmdio/node-imgur.git",
     "jquery": "^3.1.1",
diff --git a/public/views/foot.ejs b/public/views/foot.ejs
index 4294070..f1bc0c5 100644
--- a/public/views/foot.ejs
+++ b/public/views/foot.ejs
@@ -23,6 +23,7 @@
 <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.4/lodash.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.5.0/socket.io.min.js" defer></script>
 <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js" defer></script>
+<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/highlight.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/1.3.0/viz.js" defer></script>
 <%- include build/index-scripts %>
 <script src="<%- url %>/js/google-drive-upload.js" defer></script>
diff --git a/public/views/index.ejs b/public/views/index.ejs
index 4ab3cde..bdfe058 100644
--- a/public/views/index.ejs
+++ b/public/views/index.ejs
@@ -208,6 +208,7 @@
     <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
 	<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" defer></script>
     <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js" defer></script>
+    <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/highlight.min.js" defer></script>
     <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.4/lodash.min.js" defer></script>
     <%- include build/cover-scripts %>
 </body>
diff --git a/public/views/pretty.ejs b/public/views/pretty.ejs
index 8fecb04..8968fec 100644
--- a/public/views/pretty.ejs
+++ b/public/views/pretty.ejs
@@ -103,6 +103,7 @@
 <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
 <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" defer></script>
 <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js" defer></script>
+<script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/highlight.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.4/lodash.min.js" defer></script>
 <script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/1.3.0/viz.js" defer></script>
 <%- include build/pretty-scripts %>
diff --git a/public/views/slide.ejs b/public/views/slide.ejs
index 398f40b..089ced3 100644
--- a/public/views/slide.ejs
+++ b/public/views/slide.ejs
@@ -104,6 +104,7 @@
         <script src="//ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
         <script src="//cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
         <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js" defer></script>
+        <script src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.7.0/highlight.min.js" defer></script>
         <script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/4.16.4/lodash.min.js" defer></script>
         <script src="//cdnjs.cloudflare.com/ajax/libs/viz.js/1.3.0/viz.js" defer></script>
         <%- include build/slide-scripts %>
diff --git a/webpackBaseConfig.js b/webpackBaseConfig.js
index 7648cd8..946ef4d 100644
--- a/webpackBaseConfig.js
+++ b/webpackBaseConfig.js
@@ -129,7 +129,8 @@ module.exports = {
         "lodash": "_",
         "jquery": "$",
         "moment": "moment",
-        "handlebars": "Handlebars"
+        "handlebars": "Handlebars",
+        "highlight.js": "hljs"
     },
 
     module: {