diff --git a/constance/admin.py b/constance/admin.py
index 37c3cd3..a6475d2 100644
--- a/constance/admin.py
+++ b/constance/admin.py
@@ -153,6 +153,7 @@ class ConstanceAdmin(admin.ModelAdmin):
             'opts': Config._meta,
             'form': form,
             'media': self.media + form.media,
+            'icon_type': 'gif' if VERSION < (1, 9) else 'svg',
         }
         for name, options in settings.CONFIG.items():
             default, help_text = options[0], options[1]
diff --git a/constance/templates/admin/constance/change_list.html b/constance/templates/admin/constance/change_list.html
index 71c7da1..7a2fe66 100644
--- a/constance/templates/admin/constance/change_list.html
+++ b/constance/templates/admin/constance/change_list.html
@@ -74,9 +74,9 @@
                         </td>
                     <td>
                         {% if item.modified %}
-                            <img src="{% static 'admin/img/icon-yes.gif' %}" alt="{{ item.modified }}" />
+                            <img src="{% static 'admin/img/icon-yes.'|add:icon_type %}" alt="{{ item.modified }}" />
                         {% else %}
-                            <img src="{% static 'admin/img/icon-no.gif' %}" alt="{{ item.modified }}" />
+                            <img src="{% static 'admin/img/icon-no.'|add:icon_type %}" alt="{{ item.modified }}" />
                         {% endif %}
                     </td>
                     </tr>