diff --git a/libs/langgraph/langgraph/pregel/algo.py b/libs/langgraph/langgraph/pregel/algo.py
index 0084034a5..940edbada 100644
--- a/libs/langgraph/langgraph/pregel/algo.py
+++ b/libs/langgraph/langgraph/pregel/algo.py
@@ -29,8 +29,8 @@ from langgraph.constants import (
     CONFIG_KEY_TASK_ID,
     INTERRUPT,
     NO_WRITES,
-    NS_SEP,
     NS_END,
+    NS_SEP,
     PULL,
     PUSH,
     RESERVED,