diff --git a/pyproject.toml b/pyproject.toml
index 61e87e9..560ad1b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,8 @@ tongyi = [
 viz = [
   "pydot>=2.0.0",
   "graphviz>=0.20.1",
-  "grandalf"
+  "grandalf",
+  "langsmith"
 ]
 mcp-adapters = [
   "langchain-mcp-adapters>=0.1.4",
@@ -46,7 +47,8 @@ all = [
   "pydot>=2.0.0",
   "graphviz>=0.20.1",
   "langchain-mcp-adapters>=0.1.4",
-  "grandalf"
+  "grandalf",
+  "langsmith"
 ]