diff --git a/tensordict/base.py b/tensordict/base.py
index bae83ba67..f361c93c8 100644
--- a/tensordict/base.py
+++ b/tensordict/base.py
@@ -22,8 +22,9 @@
     OrderedDict,
     overload,
     Sequence,
+    Tuple,
     TypeVar,
-    Union, Tuple,
+    Union,
 )
 
 import numpy as np