diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 0844335..b30461b 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -7,7 +7,7 @@ requires-python = ">=3.12"
 dependencies = [
     "fastapi>=0.138.0",
     "httpx>=0.28.1",
-    "langchain-google-genai>=4.2.5",
+    "langchain-google-genai>=4.2.6",
     "langgraph>=1.2.6",
     "pydantic>=2.13.4",
     "python-dotenv>=1.2.2",