diff --git a/hyperliquid/utils/types.py b/hyperliquid/utils/types.py
index 0c901c10..392c82ce 100644
--- a/hyperliquid/utils/types.py
+++ b/hyperliquid/utils/types.py
@@ -65,7 +65,7 @@
 AllMidsData = TypedDict("AllMidsData", {"mids": Dict[str, str]})
 AllMidsMsg = TypedDict("AllMidsMsg", {"channel": Literal["allMids"], "data": AllMidsData})
 L2Level = TypedDict("L2Level", {"px": str, "sz": str, "n": int})
-L2BookData = TypedDict("L2BookData", {"coin": str, "levels": Tuple[List[L2Level]], "time": int})
+L2BookData = TypedDict("L2BookData", {"coin": str, "levels": Tuple[List[L2Level], List[L2Level]], "time": int})
 L2BookMsg = TypedDict("L2BookMsg", {"channel": Literal["l2Book"], "data": L2BookData})
 PongMsg = TypedDict("PongMsg", {"channel": Literal["pong"]})
 Trade = TypedDict("Trade", {"coin": str, "side": Side, "px": str, "sz": int, "hash": str, "time": int})