diff --git a/app/javascript/components/ComboBox.tsx b/app/javascript/components/ComboBox.tsx
index d93b957e8..982b784d4 100644
--- a/app/javascript/components/ComboBox.tsx
+++ b/app/javascript/components/ComboBox.tsx
@@ -48,6 +48,7 @@ export function ComboBox({
     <AriaComboBox
       {...props}
       className={`fr-ds-combobox ${className ?? ''}`}
+      menuTrigger="focus"
       shouldFocusWrap={true}
     >
       {label ? <Label className="fr-label">{label}</Label> : null}