diff --git a/geomagio/metadata/instrument/Instrument.py b/geomagio/metadata/instrument/Instrument.py
index 378ed7da0f2cf7107bcfb2eead7a28c0b413f836..4214667e8e7f1adae0a4c31d49e9ff699c156333 100644
--- a/geomagio/metadata/instrument/Instrument.py
+++ b/geomagio/metadata/instrument/Instrument.py
@@ -1,4 +1,4 @@
-from types import Optional
+from typing import Optional
 from pydantic import BaseModel, Field
 
 from enum import Enum