diff --git a/components/ReportCard.tsx b/components/ReportCard.tsx
index a44734a..8a63dc7 100644
--- a/components/ReportCard.tsx
+++ b/components/ReportCard.tsx
@@ -25,9 +25,7 @@ export default function (props: ReportCardProps & { port?: MessagePort }) {
   const actionMap: { [k: number]: number } = {};
 
   for (let i = 0; i < props.target_ids.length; i++)
-    Object.defineProperty(targetMap, props.target_ids[i], {
-      value: props.target_usernames[i],
-    });
+    targetMap[props.target_ids[i]] = props.target_usernames[i];
 
   async function submitActions() {
     setLoading(true);