diff --git a/dpipe/__version__.py b/dpipe/__version__.py
index abeeedb..f0ede3d 100644
--- a/dpipe/__version__.py
+++ b/dpipe/__version__.py
@@ -1 +1 @@
-__version__ = '0.4.0'
+__version__ = '0.4.1'
diff --git a/dpipe/im/metrics.py b/dpipe/im/metrics.py
index 66d8247..171e730 100644
--- a/dpipe/im/metrics.py
+++ b/dpipe/im/metrics.py
@@ -83,7 +83,7 @@ def iou(x: np.ndarray, y: np.ndarray) -> float:
 
 
 def get_area(start, stop):
-    return np.product(np.maximum(stop - start, 0))
+    return np.prod(np.maximum(stop - start, 0))
 
 
 def box_iou(a_start_stop, b_start_stop):
diff --git a/dpipe/im/utils.py b/dpipe/im/utils.py
index 26625ce..71fcf84 100644
--- a/dpipe/im/utils.py
+++ b/dpipe/im/utils.py
@@ -67,10 +67,6 @@ def wrapper(*args_, **kwargs_):
     return decorator
 
 
-def name_changed(func: Callable, old_name: str, date: str):
-    return np.deprecate(func, old_name=old_name, new_name=func.__name__)
-
-
 def get_mask_volume(mask: np.ndarray, *spacing: AxesParams, location: bool = False) -> float:
     """
     Calculates the ``mask`` volume given its spatial ``spacing``.