diff --git a/addons/website/static/src/xml/website_form_editor.xml b/addons/website/static/src/xml/website_form_editor.xml
index bcd040b6ddc..ee2888a19dc 100644
--- a/addons/website/static/src/xml/website_form_editor.xml
+++ b/addons/website/static/src/xml/website_form_editor.xml
@@ -236,7 +236,7 @@
                 <input
                     type="checkbox"
                     value="Yes"
-                    class="s_website_form_input"
+                    class="s_website_form_input form-check-input"
                     t-att-name="field.name"
                     t-att-checked="field.value and 'checked' or None"
                     t-att-required="field.required || field.modelRequired || None"