diff --git a/app/views/posts/index.html.erb b/app/views/posts/index.html.erb
index a7a2ca72a..7a341cd84 100644
--- a/app/views/posts/index.html.erb
+++ b/app/views/posts/index.html.erb
@@ -80,4 +80,7 @@
   <% if @post_set.hide_from_crawler? %>
     <meta name="robots" content="nofollow,noindex">
   <% end %>
+  <% if @post_set.has_explicit? %>
+    <meta name="rating" content="adult">
+  <% end %>
 <% end %>
diff --git a/app/views/posts/show.html.erb b/app/views/posts/show.html.erb
index 4e9e6a440..21ff51624 100644
--- a/app/views/posts/show.html.erb
+++ b/app/views/posts/show.html.erb
@@ -183,6 +183,10 @@
     <% end %>
   <% end %>
 
+  <% if @post.rating == "e" %>
+    <meta name="rating" content="adult">
+  <% end %>
+
   <%= auto_discovery_link_tag(:atom, comments_url(:atom, search: { post_id: @post.id }), title: "Comments for post ##{@post.id}") %>
 <% end %>