diff --git a/lib/form/templates/element-group.mustache b/lib/form/templates/element-group.mustache
index 7a53d379e31..4664a090292 100644
--- a/lib/form/templates/element-group.mustache
+++ b/lib/form/templates/element-group.mustache
@@ -7,7 +7,7 @@
         {{/element.hiddenlabel}}
     {{/label}}
     {{$element}}
-        <fieldset class="m-0 p-0 border-0">
+        <fieldset class="w-100 m-0 p-0 border-0">
             <legend class="sr-only">{{label}}</legend>
             <div class="d-flex flex-wrap">
             {{#element.elements}}