diff --git a/pyproject.toml b/pyproject.toml
index 9cac24e..fc5a04f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -119,7 +119,7 @@ pre-commit-ci = [
 #   .venv/bin/python -m pytest test/unit/adapters/langchain/test_getattr_contract_with_langchain.py
 langchain-test = [
     { include-group = "test" },
-    "langchain-core>=0.3.0,<1.4.0",
+    "langchain-core>=0.3.0,<1.5.0",
 ]
 docs = [
     "mkdocs>=1.6.0,<2",
diff --git a/uv.lock b/uv.lock
index 61e39f6..969ba03 100644
--- a/uv.lock
+++ b/uv.lock
@@ -131,7 +131,7 @@ docs = [
 ]
 langchain-test = [
     { name = "agno", specifier = ">=2.0.0" },
-    { name = "langchain-core", specifier = ">=0.3.0,<1.4.0" },
+    { name = "langchain-core", specifier = ">=0.3.0,<1.5.0" },
     { name = "llama-index-core", specifier = ">=0.10.0" },
     { name = "openai-agents", specifier = ">=0.1.0" },
     { name = "pydantic-ai", specifier = ">=0.3.0" },