diff --git a/frontend-next/src/components/app/header.js b/frontend-next/src/components/app/header.js
index 42d82eb..671eb0a 100644
--- a/frontend-next/src/components/app/header.js
+++ b/frontend-next/src/components/app/header.js
@@ -49,6 +49,7 @@ function addToMyRooms(chatRoomObj, user) {
   );
   var path =
     chatRoomObj.path + "/" + chatRoomObj.name + "-" + chatRoomObj.timestamp;
+  user.lastOnline = serverTimestamp();
   set(ref(database, `/rooms/${path}/users/all/${user.uid}`), user);
 }