diff --git a/app/templates/posts/show.html.slim b/app/templates/posts/show.html.slim
index 68f4cea..400a673 100644
--- a/app/templates/posts/show.html.slim
+++ b/app/templates/posts/show.html.slim
@@ -7,7 +7,7 @@ article class="h-entry"
       - if post.photos?
         - post.photos.each do |photo|
           figure
-            img src=photo["value"] alt=photo["alt"]
+            img class="u-photo" src=photo["value"] alt=photo["alt"]
             figcaption
               = photo["alt"]
       div class="e-content"