diff --git a/nion/data/DataAndMetadata.py b/nion/data/DataAndMetadata.py
index 2a6dcf7..262f966 100644
--- a/nion/data/DataAndMetadata.py
+++ b/nion/data/DataAndMetadata.py
@@ -579,9 +579,8 @@ def __deepcopy__(self, memo: typing.Dict[typing.Any, typing.Any]) -> DataAndMeta
         memo[id(self)] = deepcopy
         return deepcopy
 
-    def __array__(self, dtype: typing.Optional[numpy.typing.DTypeLike] = None, *, copy: typing.Optional[numpy.bool] = None) -> _ImageDataType:
+    def __array__(self, dtype: typing.Optional[numpy.typing.DTypeLike] = None, *, copy: bool | None = None) -> _ImageDataType:
         if self.data is not None:
-            # return self.data.__array__(numpy.dtype(dtype), copy=copy)
             return self.data.__array__(numpy.dtype(dtype), copy=copy)
         raise Exception("Cannot convert to NumPy array.")