diff --git a/h5grove/fastapi_utils.py b/h5grove/fastapi_utils.py
index e680638..e64c7b8 100644
--- a/h5grove/fastapi_utils.py
+++ b/h5grove/fastapi_utils.py
@@ -1,7 +1,7 @@
 """Helpers for usage with `FastAPI <https://fastapi.tiangolo.com/>`_"""
 from fastapi import APIRouter, Depends, Response, Query, Request
 from fastapi.routing import APIRoute
-from pydantic import BaseSettings
+from pydantic_settings import BaseSettings
 from typing import List, Optional, Union, Callable
 
 from .content import (
diff --git a/setup.cfg b/setup.cfg
index 51a7fa8..451e86c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,6 +27,8 @@ install_requires =
 [options.extras_require]
 fastapi = 
     fastapi
+	pydantic > 2
+	pydantic-settings
 	uvicorn
 flask =
 	Flask
diff --git a/test/conftest.py b/test/conftest.py
index bbbda05..ce6c6dd 100644
--- a/test/conftest.py
+++ b/test/conftest.py
@@ -111,7 +111,7 @@ def subprocess_server(tmp_path_factory, request):
     env = os.environ.copy()
     env["PYTHONPATH"] = f"{str(project_root_dir)}:{env.get('PYTHONPATH', '')}"
     process = subprocess.Popen(cmd, env=env)
-    time.sleep(1)
+    time.sleep(5)
     assert process.poll() is None  # Check that server is running
 
     yield SubprocessServer(served_dir=base_dir, base_url=f"http://{host}:{port}")