diff --git a/pyproject.toml b/pyproject.toml
index 3806fee56..e1d684b7e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,6 +31,7 @@ requires-python = '>=3.8,<3.13'
 dependencies = [
   "requests",
   "urllib3>=1.26.4",
+  "gunicorn>=20.0.4,<21.0.0",
   "minio",
   "grpcio~=1.60.0",
   "grpcio-tools~=1.60.0",