diff --git a/matrix_utils.py b/matrix_utils.py
index 6fecb3b..50415f0 100644
--- a/matrix_utils.py
+++ b/matrix_utils.py
@@ -52,7 +52,7 @@ async def join_matrix_room(matrix_client, room_id_or_alias: str) -> None:
     """Join a Matrix room by its ID or alias."""
     try:
         if room_id_or_alias.startswith("#"):
-            response = await matrix_client.room_resolve_alias(room_id_or_alias)
+            response = await matrix_client.resolve_room_alias(room_id_or_alias)
             if not response.room_id:
                 logger.error(
                     f"Failed to resolve room alias '{room_id_or_alias}': {response.message}"
@@ -63,7 +63,7 @@ async def join_matrix_room(matrix_client, room_id_or_alias: str) -> None:
             room_id = room_id_or_alias
 
         if room_id not in matrix_client.rooms:
-            response = await matrix_client.join(room_id_or_alias)
+            response = await matrix_client.join(room_id)
             if response and hasattr(response, "room_id"):
                 logger.info(f"Joined room '{room_id_or_alias}' successfully")
             else: