diff --git a/components/ChecklistItem/Heading.js b/components/ChecklistItem/Heading.js
index 94122cd..9fa54e6 100644
--- a/components/ChecklistItem/Heading.js
+++ b/components/ChecklistItem/Heading.js
@@ -17,6 +17,7 @@ export const Heading = ({ resource, isCollapsed, handleCollapse }: Props) => (
         onClick={handleCollapse}
         aria-controls={`content_${resource.id}`}
         aria-expanded={!isCollapsed}
+        type="button"
       >
         {isCollapsed ? 'Show details' : 'Hide details'}
       </Uncollapse>