diff --git a/jarvis/data/units.py b/jarvis/data/units.py
index 7669641..9fd7be6 100644
--- a/jarvis/data/units.py
+++ b/jarvis/data/units.py
@@ -4,7 +4,7 @@ Unit Converter utilities.
 Rates based on https://github.com/microsoft/calculator
 """
 
-from dataclasses import dataclass, field
+from dataclasses import dataclass
 from typing import ClassVar