diff --git a/pyproject.toml b/pyproject.toml
index d7b038fadb9..c2c34228175 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,7 +23,7 @@ dependencies = [
     "langchain==1.3.14",
     "langchain-anthropic==1.4.8",
     "langchain-aws==1.6.2",
-    "langchain-core==1.4.9",
+    "langchain-core==1.5.1",
     "langchain-google-genai==4.3.1",
     "langchain-huggingface==1.2.2",
     "langchain-mcp-adapters==0.3.0",