diff --git a/pomice/pool.py b/pomice/pool.py
index 68a5c8a..f290aad 100644
--- a/pomice/pool.py
+++ b/pomice/pool.py
@@ -159,7 +159,7 @@ class Node:
 
         self._players: Dict[int, Player] = {}
 
-        self._spotify_client_id: Optional[int] = spotify_client_id
+        self._spotify_client_id: Optional[str] = spotify_client_id
         self._spotify_client_secret: Optional[str] = spotify_client_secret
 
         self._apple_music_client: Optional[applemusic.Client] = None