diff --git a/generic/templates/generic/partials/examcollection_bulk_add_groups_form.html b/generic/templates/generic/partials/examcollection_bulk_add_groups_form.html
index eb74d261..d75183cc 100644
--- a/generic/templates/generic/partials/examcollection_bulk_add_groups_form.html
+++ b/generic/templates/generic/partials/examcollection_bulk_add_groups_form.html
@@ -1,5 +1,5 @@
 {% load crispy_forms_tags %}
-<form hx-post="{% url 'generic:exam_collection_bulk_add_groups' collection.pk %}" hx-target="#bulk-add-groups" hx-swap="innerHTML" class="bulk-add-groups-form">
+<form method="post" action="{% url 'generic:exam_collection_bulk_add_groups' collection.pk %}" hx-post="{% url 'generic:exam_collection_bulk_add_groups' collection.pk %}" hx-target="#bulk-add-groups" hx-swap="innerHTML" class="bulk-add-groups-form">
     {% csrf_token %}
 
     {# Render fields with crispy. The form helper sets form_tag=False so the surrounding
@@ -7,7 +7,7 @@
     {{ form|crispy }}
 
     <div class="mt-2">
-        <button type="submit" class="btn btn-primary btn-sm">Add groups</button>
+        <button type="button" class="btn btn-primary btn-sm" hx-post="{% url 'generic:exam_collection_bulk_add_groups' collection.pk %}" hx-include="input[name='csrfmiddlewaretoken'], select[name='cid_user_groups'], select[name='user_user_groups'], select[name='exam_types']" hx-target="#bulk-add-groups" hx-swap="innerHTML">Add groups</button>
         <button type="button" class="btn btn-secondary btn-sm" hx-get="{% url 'generic:examcollection_detail' collection.pk %}" hx-target="#bulk-add-groups" hx-swap="innerHTML">Cancel</button>
     </div>
 </form>