diff --git a/index.js b/index.js
index 5578ee0..1ad7dc4 100644
--- a/index.js
+++ b/index.js
@@ -131,7 +131,10 @@ client.on("Room.timeline", async function (event, room) {
   if (event.getLocalAge() > 5000) return;
   if (event.event.sender == userId) return;
 
-  const senderPowerLevel = room.oldState.members[event.event.sender].powerLevel;
+  const senderPowerLevel = client
+    .getRoom(room.roomId)
+    .getMember(event.event.sender).powerLevel;
+
   if (senderPowerLevel <= 40) {
     if (
       event.getType() == "m.room.message" &&