diff --git a/libs/checkpoint/langgraph/checkpoint/serde/base.py b/libs/checkpoint/langgraph/checkpoint/serde/base.py
index b007341eb..1a7752608 100644
--- a/libs/checkpoint/langgraph/checkpoint/serde/base.py
+++ b/libs/checkpoint/langgraph/checkpoint/serde/base.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from typing import Any, Protocol