diff --git a/pyproject.toml b/pyproject.toml
index 4e3413b175f..0b55dbdb058 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
     "langchain-huggingface==1.2.2",
     "langchain-mcp-adapters==0.3.0",
     "langchain-ollama==1.1.0",
-    "langchain-openai==1.3.5",
+    "langchain-openai==1.4.0",
     "langgraph==1.2.9",
     "torch==2.13.0",
     "sentence-transformers==5.6.0",