diff --git a/templates/atom.xml b/templates/atom.xml
index 3aa11f0..2bb2a8e 100644
--- a/templates/atom.xml
+++ b/templates/atom.xml
@@ -75,7 +75,7 @@
         <link rel="alternate" href="{{ page.permalink | safe }}" type="text/html"/>
         <id>{{ page.permalink | safe }}</id>
         {% if page.summary -%}
-            <summary type="html">{{ page.summary | striptags | safe }}</summary>
+            <summary type="html">{{ page.summary | striptags | safe | trim_end_matches(pat=".") }}…</summary>
         {% elif page.description -%}
             <summary type="html">{{ page.description | striptags | safe }}</summary>
         {% endif -%}
diff --git a/templates/macros/list_posts.html b/templates/macros/list_posts.html
index 1b12c68..bba9aca 100644
--- a/templates/macros/list_posts.html
+++ b/templates/macros/list_posts.html
@@ -34,7 +34,7 @@
                     {% if post.description %}
                         <p>{{ post.description | striptags | safe }}</p>
                     {% elif post.summary %}
-                        <p>{{ post.summary | striptags | safe }}</p>
+                        <p>{{ post.summary | striptags | safe | trim_end_matches(pat=".") }}…</p>
                     {% endif %}
                 </div>