diff --git a/libs/standard-tests/pyproject.toml b/libs/standard-tests/pyproject.toml
index 369335e4253..ebaf907035b 100644
--- a/libs/standard-tests/pyproject.toml
+++ b/libs/standard-tests/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 version = "1.1.8"
 requires-python = ">=3.10.0,<4.0.0"
 dependencies = [
-    "langchain-core",
+    "langchain-core>=1.4.0,<2.0.0",
     "pytest>=9.0.3,<10.0.0",
     "pytest-asyncio>=1.3.0,<2.0.0",
     "httpx>=0.28.1,<1.0.0",