diff --git a/ietf/templates/doc/document_rfc.html b/ietf/templates/doc/document_rfc.html
index 3d6ffc1f79..6ceb4427c7 100644
--- a/ietf/templates/doc/document_rfc.html
+++ b/ietf/templates/doc/document_rfc.html
@@ -72,7 +72,7 @@
                             {% if doc.ad %}
                                 {% person_link doc.ad %}
                             {% else %}
-                                <span class="text-muted">
+                                <span class="text-body-secondary">
                                     (None)
                                 </span>
                             {% endif %}
@@ -95,7 +95,7 @@
                             {% if doc.notify %}
                                 {{ doc.notify|linkify }}
                             {% else %}
-                                <span class="text-muted">
+                                <span class="text-body-secondary">
                                     (None)
                                 </span>
                             {% endif %}
@@ -324,7 +324,7 @@
                             {% if not forloop.last %}<br>{% endif %}
                         {% endfor %}
                     </p>
-                    <p class="text-muted card-text">
+                    <p class="text-body-secondary card-text">
                         (Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)
                     </p>
                 </div>
@@ -336,4 +336,4 @@
         </script>
         <script src="{% static 'ietf/js/document_timeline.js' %}">
         </script>
-    {% endblock %}
\ No newline at end of file
+    {% endblock %}