diff --git a/addons/portal_rating/static/src/xml/portal_rating_composer.xml b/addons/portal_rating/static/src/xml/portal_rating_composer.xml
index af6f022e04b..65f2b55b55a 100644
--- a/addons/portal_rating/static/src/xml/portal_rating_composer.xml
+++ b/addons/portal_rating/static/src/xml/portal_rating_composer.xml
@@ -12,7 +12,9 @@
                     <t t-set="inline_mode" t-value="true"/>
                 </t>
             </div>
-            <button t-if="widget.options['display_composer']" type="button" class="btn btn-sm btn-primary mx-3" data-toggle="modal" data-target="#ratingpopupcomposer">
+            <button t-if="widget.options['display_composer']" type="button"
+                t-att-class="'btn btn-sm mx-3 ' + widget.options['link_btn_classes'] or 'btn-primary'"
+                data-toggle="modal" data-target="#ratingpopupcomposer">
                 <t t-if="widget.options['display_composer']">
                     <t t-if="widget.options['default_message_id']">
                         Modify your review
diff --git a/addons/portal_rating/views/rating_templates.xml b/addons/portal_rating/views/rating_templates.xml
index 78561828a00..7125f283f5d 100644
--- a/addons/portal_rating/views/rating_templates.xml
+++ b/addons/portal_rating/views/rating_templates.xml
@@ -47,7 +47,8 @@
             t-att-data-default_rating_value="default_rating_value"
             t-att-data-default_attachment_ids="default_attachment_ids"
             t-att-data-force_submit_url="force_submit_url"
-            t-att-data-disable_composer="disable_composer">
+            t-att-data-disable_composer="disable_composer"
+            t-att-data-link_btn_classes="_link_btn_classes">
         </div>
     </template>
 </odoo>
diff --git a/addons/website_slides/views/website_slides_templates_course.xml b/addons/website_slides/views/website_slides_templates_course.xml
index 8ddb367c90a..e6e547b9ba1 100644
--- a/addons/website_slides/views/website_slides_templates_course.xml
+++ b/addons/website_slides/views/website_slides_templates_course.xml
@@ -138,7 +138,6 @@
                             </div>
                             <div class="d-flex flex-column justify-content-center h5 flex-grow-1 mb-md-5" t-if="channel.allow_comment">
                                 <t t-call="portal_rating.rating_stars_static_popup_composer">
-                                    <t t-set="btn_classes" t-value="'btn-warning'"/>
                                     <t t-set="rating_avg" t-value="rating_avg"/>
                                     <t t-set="rating_total" t-value="rating_count"/>
                                     <t t-set="object" t-value="channel"/>
@@ -151,6 +150,7 @@
                                     <t t-set="default_attachment_ids" t-value="last_message_attachment_ids"/>
                                     <t t-set="force_submit_url" t-value="'/slides/mail/update_comment' if last_message_id else False"/>
                                     <t t-set="disable_composer" t-value="not channel.can_review"/>
+                                    <t t-set="_link_btn_classes" t-value="'btn-link text-white'"/>
                                 </t>
                             </div>
                         </div>