diff --git a/boards/templates/boards/authors.html b/boards/templates/boards/authors.html
--- a/boards/templates/boards/authors.html
+++ b/boards/templates/boards/authors.html
@@ -29,7 +29,9 @@
                 {% for value in values.contacts %}
                     <a href="mailto:{{ value }}">{{ value }}</a>
                 {% endfor %} -
-                {{ values.roles|join:', ' }}
+                {% for value in values.roles %}
+                    {{ value }}{% if not forloop.last %}, {% endif %}
+                {% endfor %}
             </p>
         {% endfor %}
         <br />