diff --git a/epymorph/geo/adrio/adrio.py b/epymorph/geo/adrio/adrio.py
index 5b99a232..1fca4e08 100644
--- a/epymorph/geo/adrio/adrio.py
+++ b/epymorph/geo/adrio/adrio.py
@@ -7,7 +7,7 @@
 
 from numpy.typing import NDArray
 
-from epymorph.geo.spec import AttributeDef, TimePeriod
+from epymorph.geo.spec import TimePeriod
 from epymorph.geography.scope import GeoScope
 from epymorph.simulation import AttributeDef
 
diff --git a/epymorph/geo/adrio/census/adrio_census.py b/epymorph/geo/adrio/census/adrio_census.py
index 704235b7..f2b2b186 100644
--- a/epymorph/geo/adrio/census/adrio_census.py
+++ b/epymorph/geo/adrio/census/adrio_census.py
@@ -12,7 +12,7 @@
 from epymorph.data_type import CentroidDType
 from epymorph.error import GeoValidationException
 from epymorph.geo.adrio.adrio import ADRIO, ADRIOMaker
-from epymorph.geo.spec import AttributeDef, TimePeriod, Year
+from epymorph.geo.spec import TimePeriod, Year
 from epymorph.geography.us_census import (BLOCK_GROUP, COUNTY, STATE, TRACT,
                                           BlockGroupScope, CensusScope,
                                           CountyScope, StateScope,