diff --git a/pyproject.toml b/pyproject.toml
index e502859..b1b33e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ dependencies = [
   "fastapi[standard]>=0.115.2",
   "langchain==0.3.27",
   "langchain-anthropic==0.3.22",
-  "langchain-openai==0.3.35",
+  "langchain-openai==1.1.14",
   "langchain-google-genai==2.1.12",
   "langchain-google-vertexai==2.1.2",
   "igittigitt>=2.1.5",