diff --git a/masque/file/svg.py b/masque/file/svg.py
index 8c4b43d..148f6d4 100644
--- a/masque/file/svg.py
+++ b/masque/file/svg.py
@@ -154,7 +154,7 @@ def poly2path(vertices: ArrayLike) -> str:
     Returns:
         SVG path-string.
     """
-    verts = numpy.array(vertices, copy=False)
+    verts = numpy.asarray(vertices)
     commands = 'M{:g},{:g} '.format(verts[0][0], verts[0][1])      # noqa: UP032
     for vertex in verts[1:]:
         commands += 'L{:g},{:g}'.format(vertex[0], vertex[1])      # noqa: UP032
diff --git a/masque/library.py b/masque/library.py
index 9771eaf..11a3c1e 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -460,7 +460,7 @@ class ILibraryView(Mapping[str, 'Pattern'], metaclass=ABCMeta):
         if transform is None or transform is True:
             transform = numpy.zeros(4)
         elif transform is not False:
-            transform = numpy.array(transform, dtype=float, copy=False)
+            transform = numpy.asarray(transform, dtype=float)
 
         original_pattern = pattern
 
diff --git a/masque/shapes/path.py b/masque/shapes/path.py
index dfd89f1..7412ca5 100644
--- a/masque/shapes/path.py
+++ b/masque/shapes/path.py
@@ -34,7 +34,7 @@ class Path(Shape):
         and an offset.
 
     Note that the setter for `Path.vertices` may (but may not) create a copy of the
-      passed vertex coordinates. See `numpy.array(..., copy=False)` for details.
+      passed vertex coordinates. See `numpy.asarray()` for details.
 
     A normalized_form(...) is available, but can be quite slow with lots of vertices.
     """
@@ -119,7 +119,7 @@ class Path(Shape):
         Vertices of the path (Nx2 ndarray: `[[x0, y0], [x1, y1], ...]`
 
         When setting, note that a copy of the provided vertices may or may not be made,
-        following the rules from `numpy.array(.., copy=False)`.
+        following the rules from `numpy.asarray()`.
         """
         return self._vertices
 
diff --git a/masque/shapes/polygon.py b/masque/shapes/polygon.py
index f6add4d..ea71b09 100644
--- a/masque/shapes/polygon.py
+++ b/masque/shapes/polygon.py
@@ -21,7 +21,7 @@ class Polygon(Shape):
        implicitly-closed boundary, and an offset.
 
     Note that the setter for `Polygon.vertices` may (but may not) create a copy of the
-      passed vertex coordinates. See `numpy.array(..., copy=False)` for details.
+      passed vertex coordinates. See `numpy.asarray() for details.
 
     A `normalized_form(...)` is available, but can be quite slow with lots of vertices.
     """
@@ -41,7 +41,7 @@ class Polygon(Shape):
         Vertices of the polygon (Nx2 ndarray: `[[x0, y0], [x1, y1], ...]`)
 
         When setting, note that a copy of the provided vertices may or may not be made,
-        following the rules from `numpy.array(.., copy=False)`.
+        following the rules from `numpy.asarray()`.
         """
         return self._vertices
 
diff --git a/masque/utils/pack2d.py b/masque/utils/pack2d.py
index 5de9728..ce6b006 100644
--- a/masque/utils/pack2d.py
+++ b/masque/utils/pack2d.py
@@ -38,8 +38,8 @@ def maxrects_bssf(
     Raises:
         MasqueError if `allow_rejects` is `True` but some `rects` could not be placed.
     """
-    regions = numpy.array(containers, copy=False, dtype=float)
-    rect_sizes = numpy.array(rects, copy=False, dtype=float)
+    regions = numpy.asarray(containers, dtype=float)
+    rect_sizes = numpy.asarray(rects, dtype=float)
     rect_locs = numpy.zeros_like(rect_sizes)
     rejected_inds = set()
 
@@ -139,8 +139,8 @@ def guillotine_bssf_sas(
     Raises:
         MasqueError if `allow_rejects` is `True` but some `rects` could not be placed.
     """
-    regions = numpy.array(containers, copy=False, dtype=float)
-    rect_sizes = numpy.array(rects, copy=False, dtype=float)
+    regions = numpy.asarray(containers, dtype=float)
+    rect_sizes = numpy.asarray(rects, dtype=float)
     rect_locs = numpy.zeros_like(rect_sizes)
     rejected_inds = set()
 
@@ -227,7 +227,7 @@ def pack_patterns(
         MasqueError if `allow_rejects` is `True` but some `rects` could not be placed.
     """
 
-    half_spacing = numpy.array(spacing, copy=False, dtype=float) / 2
+    half_spacing = numpy.asarray(spacing, dtype=float) / 2
 
     bounds = [library[pp].get_bounds() for pp in patterns]
     sizes = [bb[1] - bb[0] + spacing if bb is not None else spacing for bb in bounds]
diff --git a/masque/utils/vertices.py b/masque/utils/vertices.py
index 0c5f03b..b6497bd 100644
--- a/masque/utils/vertices.py
+++ b/masque/utils/vertices.py
@@ -73,8 +73,8 @@ def poly_contains_points(
     Returns:
         ndarray of booleans, [point0_is_in_shape, point1_is_in_shape, ...]
     """
-    points = numpy.array(points, copy=False)
-    vertices = numpy.array(vertices, copy=False)
+    points = numpy.asarray(points, dtype=float)
+    vertices = numpy.asarray(vertices, dtype=float)
 
     if points.size == 0:
         return numpy.zeros(0, dtype=numpy.int8)