diff --git a/tbx/project_styleguide/templates/patterns/pages/wagtail/password_required.html b/tbx/project_styleguide/templates/patterns/pages/wagtail/password_required.html
index 8dab9d04e..8fd401823 100644
--- a/tbx/project_styleguide/templates/patterns/pages/wagtail/password_required.html
+++ b/tbx/project_styleguide/templates/patterns/pages/wagtail/password_required.html
@@ -4,6 +4,8 @@
 
 {% block body_class %}template-password-required{% endblock %}
 
+{% block theme_class %}theme--light{% endblock %}
+
 {% block content %}
     <div class="password-required">
         <h1 class="password-required__title">Password required</h1>