diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 256e4ba4b2..4eb2a3b6e1 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -96,7 +96,7 @@ dependencies = [
     "PyJWT>=2.8.0",
     "cryptography>=46.0.7",
     "openai>=1.52.0",
-    "pydantic>=2.9.2",
+    "pydantic>=2.13.3",
     "gunicorn>=23.0.0",
     "tinycss2>=1.4.0",
     "pypdf>=6.10.2",