diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 2272a25..66048ee 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -11,7 +11,7 @@ dependencies = [
     "pydantic>=2.9",
     "pydantic-settings>=2.5",
     "sqlalchemy>=2.0.36",
-    "greenlet>=3.0",
+    "greenlet>=3.5.5",
     "asyncpg>=0.30",
     "alembic>=1.13",
     "redis>=5.2",