diff --git a/js/lib/utils/ItemList.js b/js/lib/utils/ItemList.js
index 215c1c765..6e631dcf6 100644
--- a/js/lib/utils/ItemList.js
+++ b/js/lib/utils/ItemList.js
@@ -50,6 +50,10 @@ export default class ItemList {
 
     for (const i in this) {
       if (this.hasOwnProperty(i) && this[i] instanceof Item) {
+        if (typeof this[i].content === 'string') {
+          this[i].content = new String(this[i].content);
+        }
+
         this[i].content.itemName = i;
         items.push(this[i]);
         this[i].key = items.length;