diff --git a/source/blog.html b/source/blog.html
index 3abadec3..4588ed2b 100644
--- a/source/blog.html
+++ b/source/blog.html
@@ -24,7 +24,7 @@ use: [posts]
 
                 {% include 'post/intro-image' with { page: post } %}
 
-                <div class="mb-4">
+                <div class="markdown mb-4">
                     {{ post.summary|markdown }}
                     {% if post.blocks.excerpt is defined %}
                         {{ post.blocks.excerpt|markdown }}