diff --git a/pyproject.toml b/pyproject.toml
index 7410f10..751a55f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ Changelog = "https://github.com/googleapis/langchain-google-cloud-sql-mssql-pyth
 test = [
     "black[jupyter]==24.8.0",
     "isort==5.13.2",
-    "langchain==0.3.1",
+    "langchain==1.0.0",
     "mypy==1.11.2",
     "pytest-asyncio==0.24.0",
     "pytest==8.3.3",