diff --git a/src/bioregistry/resolve.py b/src/bioregistry/resolve.py
index 814d75b7e..cfa37bd97 100644
--- a/src/bioregistry/resolve.py
+++ b/src/bioregistry/resolve.py
@@ -5,7 +5,7 @@
 import logging
 import typing
 from functools import lru_cache
-from typing import Any, Dict, List, Mapping, Optional, Set, Tuple, Union
+from typing import Any, Dict, List, Mapping, Optional, Set
 
 import curies