diff --git a/setup.py b/setup.py
index 21195f6a..eff2f8ba 100644
--- a/setup.py
+++ b/setup.py
@@ -176,6 +176,7 @@ if __name__ == '__main__':
     for field in dir(Fields):
         if field.startswith('_'):
             continue
+        field = getattr(Fields, field)
         extra_requires[field], _ = parse_requirements(
             f'requirements/{field}.txt')