diff --git a/source/author.html.haml b/source/author.html.haml
index 583294e..87c064f 100644
--- a/source/author.html.haml
+++ b/source/author.html.haml
@@ -16,7 +16,7 @@ cover_license: '[Cover Image](https://unsplash.com/photos/2ShvY8Lf6l0) by [Lukas
 %section.author-profile.inner
   - if gravatar?
     %figure.author-image
-      .img{style: "background-image: url(#{gravatar(author, size: 114)})"}
+      .img{style: "background-image: url(#{gravatar(author, size: 114)}); background-image: image-set(url(#{gravatar(author, size: 114)}) 1x, url(#{gravatar(author, size: 114*2)}) 2x, url(#{gravatar(author, size: 114*3)}) 3x); background-image: -webkit-image-set(url(#{gravatar(author, size: 114)}) 1x, url(#{gravatar(author, size: 114*2)}) 2x, url(#{gravatar(author, size: 114*3)}) 3x);"}
         %span.hidden #{blog_author(author).name}'s Picture
   %h1.author-title= blog_author(author).name
   .author-bio= partial("author/#{author.parameterize}")
diff --git a/source/layouts/post.haml b/source/layouts/post.haml
index badf4c0..f6e724a 100644
--- a/source/layouts/post.haml
+++ b/source/layouts/post.haml
@@ -27,7 +27,7 @@
       %footer.post-footer
         - if gravatar?
           %figure.author-image
-            %a.img{href: author_path, style: "background-image: url(#{gravatar})"}
+            %a.img{href: author_path, style: "background-image: url(#{gravatar(nil, size: 68)}); background-image: image-set(url(#{gravatar(nil, size: 68)}) 1x, url(#{gravatar(nil, size: 68*2)}) 2x, url(#{gravatar(nil, size: 68*2)}) 3x); background-image: -webkit-image-set(url(#{gravatar(nil, size: 68)}) 1x, url(#{gravatar(nil, size: 68*2)}) 2x, url(#{gravatar(nil, size: 68*2)}) 3x)"}
               %span.hidden #{blog_author.name}'s Picture
         %section.author
           %h4
diff --git a/source/partials/page_articles.haml b/source/partials/page_articles.haml
index 8f6346e..723fa29 100644
--- a/source/partials/page_articles.haml
+++ b/source/partials/page_articles.haml
@@ -12,7 +12,7 @@
         = link_to '» Read more', article, class: 'read-more'
     %footer.post-meta
       - if gravatar?
-        %img.author-thumb{src: gravatar(article.data.author, size: 24), alt: blog_author(article.data.author).name, nopin: 'nopin'}
+        %img.author-thumb{src: gravatar(article.data.author, size: 24), srcset: "#{gravatar(article.data.author, size: 24)} 1x, #{gravatar(article.data.author, size: 24*2)} 2x, #{gravatar(article.data.author, size: 24*3)} 3x", alt: blog_author(article.data.author).name, nopin: 'nopin'}
       %a{href: author_path(article.data.author)}= blog_author(article.data.author).name
       - if tags?(article)
         on #{tags(article)}