diff --git a/layouts/_default/summary.html b/layouts/_default/summary.html
index e50e651..119dbde 100644
--- a/layouts/_default/summary.html
+++ b/layouts/_default/summary.html
@@ -1,5 +1,9 @@
 <div class="post">
     <h2 class="post-title">
+        {{ range .Params.categories }}
+        <code>{{ . }}</code>
+        {{ end }}
+
         {{ with .Parent.Params.icon }}{{ partial "icon.html" . }}{{ end }}
         <a href="{{ .Permalink }}">{{ .Title | markdownify }}</a>
         {{ if .Draft }}{{ partial "icon.html" "edit" }}{{ end }}