diff --git a/app/components/editable_champ/explication_component/explication_component.html.haml b/app/components/editable_champ/explication_component/explication_component.html.haml
index 7e4822b3c..2914ce7c1 100644
--- a/app/components/editable_champ/explication_component/explication_component.html.haml
+++ b/app/components/editable_champ/explication_component/explication_component.html.haml
@@ -4,8 +4,7 @@
     = string_to_html(@champ.description, allow_a: true)
 
     - if @champ.collapsible_explanation_enabled? && @champ.collapsible_explanation_text.present?
-      %div
-        %p.fr-my-2w
-          %button{ type: "button", "aria-controls": dom_id(@champ, :explanation), "aria-expanded": "false", href: dom_id(@champ, :explanation) } Lire plus
-        %p.fr-collapse{ id: dom_id(@champ, :explanation) }
-          = @champ.collapsible_explanation_text
+      %p.fr-my-2w
+        %button{ type: "button", "aria-controls": dom_id(@champ, :explanation), "aria-expanded": "false", href: dom_id(@champ, :explanation), class: "fr-btn ft-btn--sm fr-btn--secondary" } Lire plus
+      %p.fr-collapse{ id: dom_id(@champ, :explanation) }
+        = @champ.collapsible_explanation_text