diff --git a/backend/main.py b/backend/main.py
index e594ef9..ae3401d 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -272,8 +272,8 @@ def api_update_member_role(
     data: MemberRoleUpdate,
     current_user: int = Depends(get_current_user),
 ):
-    current_role = get_member_role(room_id, current_user)
-    target_role = get_member_role(room_id, user_id)
+    current_role = get_role(room_id, current_user)
+    target_role = get_role(room_id, user_id)
 
     if current_role is None:
         raise HTTPException(