diff --git a/froide_govplan/templates/froide_govplan/detail.html b/froide_govplan/templates/froide_govplan/detail.html
index 141ae11..3b1ae9e 100644
--- a/froide_govplan/templates/froide_govplan/detail.html
+++ b/froide_govplan/templates/froide_govplan/detail.html
@@ -144,7 +144,7 @@
                 <dd>
                   <a href="{{ object.organization.website }}">
                     {% if object.organization.logo %}
-                    <img src="{{ object.organization.logo.url }}" class="img-sm" alt="{{ object.organization.name }}">
+                    <img src="{{ object.organization.logo.url }}" class="w-100 h-auto" alt="{{ object.organization.name }}">
                     {% else %}
                     {{ object.organization.name }}
                     {% endif %}