diff --git a/pyproject.toml b/pyproject.toml
index c09546451a..1605ceb1ff 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,6 +56,7 @@ dependencies = [
   "opentelemetry-sdk>=1.37.0, <=1.37.0",
   "pyarrow>=14.0.0",
   "pydantic>=2.0, <3.0.0",                                   # For data validation/models
+  "pyopenssl>=25.3.0",
   "python-dateutil>=2.9.0.post0, <3.0.0",                    # For Vertext AI Session Service
   "python-dotenv>=1.0.0, <2.0.0",                            # To manage environment variables
   "requests>=2.32.4, <3.0.0",