diff --git a/maubot.yaml b/maubot.yaml
index 554abd6..27c40f7 100644
--- a/maubot.yaml
+++ b/maubot.yaml
@@ -1,6 +1,6 @@
 maubot: 0.1.0
 id: nl.roomsoverview
-version: 2.0.0
+version: 2.0.1
 license: MIT
 modules:
   - roomsoverview
diff --git a/roomsoverview.mbp b/roomsoverview.mbp
index 518c4ce..29dff19 100644
Binary files a/roomsoverview.mbp and b/roomsoverview.mbp differ
diff --git a/roomsoverview.py b/roomsoverview.py
index f164090..a620484 100644
--- a/roomsoverview.py
+++ b/roomsoverview.py
@@ -177,7 +177,6 @@ class RoomsOverviewPlugin(Plugin):
                     members = len(d.get("joined", {}))
                 elif r.status == 404:
                     return None  # room bestaat niet (meer)
-                # 403: bestaat, maar bot heeft geen toegang
         except Exception:
             pass
 
@@ -204,18 +203,33 @@ class RoomsOverviewPlugin(Plugin):
         return None
 
     async def _is_mod(self, room_id: str, user_id: str) -> bool:
-        """Moderator (power level >= 50) in de gegeven room."""
+        """Moderator (power level >= 50) in de gegeven room.
+
+        Let op room v12+ (MSC4289): de creator heeft impliciet de maximale macht
+        en mag/hoeft niet in de users-map voor te komen. Die telt daarom mee.
+        """
+        base = self._base_url()
+        h = self._headers()
+        rid = quote(room_id, safe="")
         try:
             async with self.http.get(
-                f"{self._base_url()}/_matrix/client/v3/rooms/{quote(room_id, safe='')}/state/m.room.power_levels",
-                headers=self._headers(),
+                f"{base}/_matrix/client/v3/rooms/{rid}/state/m.room.power_levels",
+                headers=h,
                 timeout=_REQUEST_TIMEOUT,
             ) as r:
                 if r.status != 200:
                     return False
                 d = await r.json()
+            async with self.http.get(
+                f"{base}/_matrix/client/v3/rooms/{rid}/state/m.room.create",
+                headers=h,
+                timeout=_REQUEST_TIMEOUT,
+            ) as r:
+                creator = (await r.json()).get("creator") if r.status == 200 else None
         except Exception:
             return False
+        if user_id == creator:
+            return True  # MSC4289: creator heeft impliciet maximale macht
         users = d.get("users", {}) or {}
         default = int(d.get("users_default", 0) or 0)
         pl = int(users.get(user_id, default) or 0)
@@ -368,7 +382,10 @@ class RoomsOverviewPlugin(Plugin):
     @handle_rooms.subcommand(name="refresh", help="Valideer de index nu (moderator+)")
     async def refresh_index(self, evt: MessageEvent) -> None:
         if not await self._is_mod(evt.room_id, evt.sender):
-            await evt.reply("Geen permissie: moderator of hoger.")
+            await evt.reply("Geen permissie: moderator of hoger vereist.")
             return
         removed, total = await self._validate_all()
-        await evt.reply(f"Index gecontroleerd: {total - removed} rooms over, {removed} verwijderd (bestonden niet meer).")
\ No newline at end of file
+        await evt.reply(
+            f"Index gecontroleerd: {total - removed} rooms over, "
+            f"{removed} verwijderd (bestonden niet meer)."
+        )
\ No newline at end of file