diff --git a/website_altcha/static/src/altcha.xml b/website_altcha/static/src/altcha.xml
index bd94d2d3e0..ad51fef69e 100644
--- a/website_altcha/static/src/altcha.xml
+++ b/website_altcha/static/src/altcha.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <templates>
     <t t-name="website_altcha.AltchaWidget">
-        <div class="mb-0 py-2 col-12 s_website_form_custom">
+        <div class="mb-0 py-2 col-12 s_website_form_custom o_altcha_widget_container">
             <div class="row s_col_no_resize s_col_no_bgcolor">
                 <label
                     class="col-form-label col-sm-auto s_website_form_label"