diff --git a/microscope/device_server.py b/microscope/device_server.py
index a838e9fd..ac6ecf85 100644
--- a/microscope/device_server.py
+++ b/microscope/device_server.py
@@ -44,6 +44,7 @@
 import sys
 import time
 import typing
+from copy import deepcopy
 from collections.abc import Iterable
 from dataclasses import dataclass
 from logging import StreamHandler
@@ -127,7 +128,7 @@ def construct_devices() -> typing.Dict[str, Device]:
             raise TypeError("uid must be specified for floating devices")
         elif not issubclass(cls, FloatingDeviceMixin) and uid is not None:
             raise TypeError("uid must not be given for non floating devices")
-    return dict(cls=cls, host=host, port=int(port), uid=uid, conf=conf)
+    return dict(cls=cls, host=host, port=int(port), uid=uid, conf=deepcopy(conf))
 
 
 def _create_log_formatter(name: str):