diff --git a/app/templates/widgets/attachments.html b/app/templates/widgets/attachments.html
index 7c11844..529698d 100644
--- a/app/templates/widgets/attachments.html
+++ b/app/templates/widgets/attachments.html
@@ -8,7 +8,7 @@
     {% for a in comment.attachments %}
     <tr>
         <td><a href="{{ a.url }}">{{ a.name }}</a></td>
-        <td>{{ a.size }}</td>
+        <td>{{ a.size | humanize(unit='o') }}</td>
     </tr>
     {% endfor %}
 </table>