diff --git a/ndbioimage/__init__.py b/ndbioimage/__init__.py
index 8aafc8e..7b2b09a 100755
--- a/ndbioimage/__init__.py
+++ b/ndbioimage/__init__.py
@@ -653,6 +653,9 @@ class Imread(np.lib.mixins.NDArrayOperatorsMixin, ABC):
         return self.__array_fun__([np.nansum, np.nansum, np.sum], axis, dtype, out, keepdims, None, where,
                                   (sfun, s2fun, nfun), cfun)
 
+    def flatten(self, *args, **kwargs):
+        return np.asarray(self).flatten(*args, **kwargs)
+
     @wraps(np.reshape)
     def reshape(self, *args, **kwargs):
         return np.asarray(self).reshape(*args, **kwargs)
diff --git a/pyproject.toml b/pyproject.toml
index e937df4..a689a55 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ndbioimage"
-version = "2024.3.1"
+version = "2024.3.2"
 description = "Bio image reading, metadata and some affine registration."
 authors = ["W. Pomp <w.pomp@nki.nl>"]
 license = "GPLv3"