--- a/client/src/components/NotesList.js	Mon Jun 12 18:09:13 2017 +0200
+++ b/client/src/components/NotesList.js	Mon Jun 12 18:12:38 2017 +0200
@@ -18,7 +18,7 @@
   return (
     <div>
       {notes.map((note) =>
-        <Note note={note} key={note.id} />
+        <Note note={note} key={note._id} />
       )}
     </div>
   );