diff --git a/site/_includes/news_item.html b/site/_includes/news_item.html
index 08295aa8..60245d63 100644
--- a/site/_includes/news_item.html
+++ b/site/_includes/news_item.html
@@ -5,9 +5,9 @@
     </a>
   </h2>
   <span class="post-category">
-    {% for category in post.categories %}
-    <span class="label">{{ category }}</span>
-    {% endfor %}
+    <span class="label">
+      {{ post.categories | array_to_sentence_string }}
+    </span>
   </span>
   <div class="post-meta">
     <span class="post-date">
diff --git a/site/_layouts/news_item.html b/site/_layouts/news_item.html
index a09e545d..6d27976a 100644
--- a/site/_layouts/news_item.html
+++ b/site/_layouts/news_item.html
@@ -8,9 +8,9 @@ layout: news
     <a href="{{ page.url }}" class="permalink" title="Permalink">∞</a>
   </h2>
   <span class="post-category">
-    {% for category in page.categories %}
-    <span class="label">{{ category }}</span>
-    {% endfor %}
+    <span class="label">
+      {{ page.categories | array_to_sentence_string }}
+    </span>
   </span>
   <div class="post-meta">
     <span class="post-date">