diff --git a/libs/langgraph/langgraph/channels/dynamic_barrier_value.py b/libs/langgraph/langgraph/channels/dynamic_barrier_value.py
index ea6ca9815..c2c3c026f 100644
--- a/libs/langgraph/langgraph/channels/dynamic_barrier_value.py
+++ b/libs/langgraph/langgraph/channels/dynamic_barrier_value.py
@@ -1,4 +1,4 @@
-from collections.abc import Sequence
+from collections.abc import Sequence, Set
 from typing import Any, Generic, NamedTuple, Optional, Union
 
 from typing_extensions import Self
@@ -9,11 +9,11 @@ from langgraph.errors import EmptyChannelError, InvalidUpdateError
 
 
 class WaitForNames(NamedTuple):
-    names: set[Any]
+    names: Set[Any]
 
 
 class DynamicBarrierValue(
-    Generic[Value], BaseChannel[Value, Union[Value, WaitForNames], set[Value]]
+    Generic[Value], BaseChannel[Value, Union[Value, WaitForNames], Set[Value]]
 ):
     """A channel that switches between two states
 
@@ -26,7 +26,7 @@ class DynamicBarrierValue(
 
     __slots__ = ("names", "seen")
 
-    names: Optional[set[Value]]
+    names: Optional[Set[Value]]
     seen: set[Value]
 
     def __init__(self, typ: type[Value]) -> None:
@@ -55,11 +55,11 @@ class DynamicBarrierValue(
         empty.seen = self.seen.copy()
         return empty
 
-    def checkpoint(self) -> tuple[Optional[set[Value]], set[Value]]:
+    def checkpoint(self) -> tuple[Optional[Set[Value]], set[Value]]:
         return (self.names, self.seen)
 
     def from_checkpoint(
-        self, checkpoint: tuple[Optional[set[Value]], set[Value]]
+        self, checkpoint: tuple[Optional[Set[Value]], set[Value]]
     ) -> Self:
         empty = self.__class__(self.typ)
         empty.key = self.key