diff --git a/public/docs/features.md b/public/docs/features.md
index a4ffb63..e7ce89c 100644
--- a/public/docs/features.md
+++ b/public/docs/features.md
@@ -222,9 +222,6 @@ When you’re a carpenter making a beautiful chest of drawers, you’re not goin
 ### SlideShare
 {%slideshare briansolis/26-disruptive-technology-trends-2016-2018-56796196 %}
 
-### Speakerdeck
-{%speakerdeck sugarenia/xxlcss-how-to-scale-css-and-keep-your-sanity %}
-
 ### PDF
 **Caution: this might be blocked by your browser if not using an `https` URL.**
 {%pdf https://papers.nips.cc/paper/5346-sequence-to-sequence-learning-with-neural-networks.pdf %}
diff --git a/public/js/extra.js b/public/js/extra.js
index 76e9563..f8e0eb2 100644
--- a/public/js/extra.js
+++ b/public/js/extra.js
@@ -459,34 +459,13 @@ export function finishView (view) {
     // speakerdeck
   view.find('div.speakerdeck.raw').removeClass('raw')
         .each((key, value) => {
-          const url = `https://speakerdeck.com/oembed.json?url=https%3A%2F%2Fspeakerdeck.com%2F${encodeURIComponent($(value).attr('data-speakerdeckid'))}`
-            // use yql because speakerdeck not support jsonp
-          $.ajax({
-            url: 'https://query.yahooapis.com/v1/public/yql',
-            data: {
-              q: `select * from json where url ='${url}'`,
-              format: 'json'
-            },
-            dataType: 'jsonp',
-            success (data) {
-              if (!data.query || !data.query.results) return
-              const json = data.query.results.json
-              const html = json.html
-              var ratio = json.height / json.width
-              $(value).html(html)
-              const iframe = $(value).children('iframe')
-              const src = iframe.attr('src')
-              if (src.indexOf('//') === 0) { iframe.attr('src', `https:${src}`) }
-              const inner = $('<div class="inner"></div>').append(iframe)
-              const height = iframe.attr('height')
-              const width = iframe.attr('width')
-              ratio = (height / width) * 100
-              inner.css('padding-bottom', `${ratio}%`)
-              $(value).html(inner)
-              if (window.viewAjaxCallback) window.viewAjaxCallback()
-            }
-          })
-        })
+          const url = `https://speakerdeck.com/${$(value).attr('data-speakerdeckid')}`
+          const inner = $('<a>Speakerdeck</a>')
+          inner.attr('href', url)
+          inner.attr('rel', 'noopener noreferrer')
+          inner.attr('target', '_blank')
+          $(value).append(inner)
+      })
     // pdf
   view.find('div.pdf.raw').removeClass('raw')
             .each(function (key, value) {
diff --git a/public/js/index.js b/public/js/index.js
index a845b5d..76f952c 100644
--- a/public/js/index.js
+++ b/public/js/index.js
@@ -1,7 +1,6 @@
 /* eslint-env browser, jquery */
-/* global CodeMirror, Cookies, moment, editor, ui, Spinner,
-   modeType, Idle, serverurl, key, gapi, Dropbox, FilePicker
-   ot, MediaUploader, hex2rgb, num_loaded, Visibility */
+/* global CodeMirror, Cookies, moment, Spinner, Idle, serverurl,
+   key, Dropbox, ot, hex2rgb, Visibility */
 
 require('../vendor/showup/showup')