diff --git a/README.md b/README.md
index ed6930ee08..5954d640ae 100644
--- a/README.md
+++ b/README.md
@@ -141,6 +141,13 @@ If you would like to add a [fade-in-down effect](http://daneden.github.io/animat
 
 See [documentation](http://bryanbraun.github.io/anchorjs/#basic-usage) for more options.
 
+### Utterances
+[Utterances](https://utteranc.es/): _A lightweight comments widget built on GitHub issues. Use GitHub issues for blog comments, wiki pages and more!_ You can turn it on by adding a github repository to `utterances_repo`, in the form of `user/repo-name`.
+
+The issue terminology can be customized using key `utterances_issue-term`, the default is `"pathname"`, some of the other options are `"url"` and `"title"`. The full list of options can be found in the official documentation.
+
+The theme can be changed using key `utterances_theme`, the default is `github-light`, the full list as of today is: `github-dark`, `github-dark-orange`, `icy-dark`, `dark-blue`, `photon-dark`. You can also find this list on the official website.
+
 ### Put in a Pixyll Plug
 
 If you want to give credit to the Pixyll theme with a link to <http://pixyll.com> or my personal website <http://johnotander.com> somewhere, that'd be awesome. No worries if you don't.
diff --git a/_config.yml b/_config.yml
index 2da1cbb5f9..8845401190 100644
--- a/_config.yml
+++ b/_config.yml
@@ -40,6 +40,12 @@ fb_page_id:
 # (leave blank to disable Disqus)
 disqus_shortname:
 
+# Utterances github comments (utterances_repo: github_username/repository)
+# (leave blank to disable Utterances)
+utterances_repo:
+utterances_issue-term: pathname
+utterances_theme: github-light
+
 # Facebook Comments plugin
 # (leave blank to disable Facebook Comments, otherwise set it to true)
 facebook_comments:
diff --git a/_layouts/post.html b/_layouts/post.html
index a8f4763a74..ed6bc8c56a 100644
--- a/_layouts/post.html
+++ b/_layouts/post.html
@@ -50,6 +50,16 @@ <h1>{{ page.title }}</h1>
   <noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
 {% endif %}
 
+{% if site.utterances_repo %}
+  <script src="https://utteranc.es/client.js"
+        repo="{{ site.utterances_repo }}"
+        issue-term="{{ site.utterances_issue-term }}"
+        theme="{{ site.utterances_theme }}"
+        crossorigin="anonymous"
+        async>
+  </script>
+{% endif %}
+
 {% if site.facebook_comments %}
   <div class="fb-comments" data-href="{{ site.url }}{{ page.url }}" data-width="100%" data-numposts="{{ site.facebook_comments_number }}"></div>
 {% endif %}