diff --git a/examples/tutorial/basic_shapes.py b/examples/tutorial/basic_shapes.py
index f8e1eef..87baaf0 100644
--- a/examples/tutorial/basic_shapes.py
+++ b/examples/tutorial/basic_shapes.py
@@ -1,4 +1,4 @@
-from typing import Sequence
+from collections.abc import Sequence
 
 import numpy
 from numpy import pi
diff --git a/examples/tutorial/devices.py b/examples/tutorial/devices.py
index 9556ee3..6b9cfa2 100644
--- a/examples/tutorial/devices.py
+++ b/examples/tutorial/devices.py
@@ -1,4 +1,4 @@
-from typing import Sequence, Mapping
+from collections.abc import Sequence, Mapping
 
 import numpy
 from numpy import pi
diff --git a/examples/tutorial/library.py b/examples/tutorial/library.py
index f871f35..eab8a12 100644
--- a/examples/tutorial/library.py
+++ b/examples/tutorial/library.py
@@ -1,4 +1,5 @@
-from typing import Sequence, Callable, Any
+from typing import Any
+from collections.abc import Sequence, Callable
 from pprint import pformat
 
 import numpy
diff --git a/examples/tutorial/pather.py b/examples/tutorial/pather.py
index 5aec53c..a7aad68 100644
--- a/examples/tutorial/pather.py
+++ b/examples/tutorial/pather.py
@@ -1,7 +1,7 @@
 """
 Manual wire routing tutorial: Pather and BasicTool
 """
-from typing import Callable
+from collections.abc import Callable
 from numpy import pi
 from masque import Pather, RenderPather, Library, Pattern, Port, layer_t, map_layers
 from masque.builder.tools import BasicTool, PathTool
diff --git a/examples/tutorial/pcgen.py b/examples/tutorial/pcgen.py
index 17243e4..c265f64 100644
--- a/examples/tutorial/pcgen.py
+++ b/examples/tutorial/pcgen.py
@@ -2,7 +2,7 @@
 Routines for creating normalized 2D lattices and common photonic crystal
  cavity designs.
 """
-from typing import Sequence
+from collection.abc import Sequence
 
 import numpy
 from numpy.typing import ArrayLike, NDArray
diff --git a/examples/tutorial/renderpather.py b/examples/tutorial/renderpather.py
index a7963b8..cb002f3 100644
--- a/examples/tutorial/renderpather.py
+++ b/examples/tutorial/renderpather.py
@@ -1,7 +1,7 @@
 """
 Manual wire routing tutorial: RenderPather an PathTool
 """
-from typing import Callable
+from collections.abc import Callable
 from masque import RenderPather, Library, Pattern, Port, layer_t, map_layers
 from masque.builder.tools import PathTool
 from masque.file.gdsii import writefile
diff --git a/masque/builder/builder.py b/masque/builder/builder.py
index c18e17e..dd971d2 100644
--- a/masque/builder/builder.py
+++ b/masque/builder/builder.py
@@ -1,7 +1,8 @@
 """
 Simplified Pattern assembly (`Builder`)
 """
-from typing import Self, Sequence, Mapping
+from typing import Self
+from collections.abc import Sequence, Mapping
 import copy
 import logging
 from functools import wraps
diff --git a/masque/builder/pather.py b/masque/builder/pather.py
index c795e75..0879882 100644
--- a/masque/builder/pather.py
+++ b/masque/builder/pather.py
@@ -1,7 +1,8 @@
 """
 Manual wire/waveguide routing (`Pather`)
 """
-from typing import Self, Sequence, MutableMapping, Mapping
+from typing import Self
+from collections.abc import Sequence, MutableMapping, Mapping
 import copy
 import logging
 from pprint import pformat
diff --git a/masque/builder/renderpather.py b/masque/builder/renderpather.py
index e35a672..e58386d 100644
--- a/masque/builder/renderpather.py
+++ b/masque/builder/renderpather.py
@@ -1,7 +1,8 @@
 """
 Pather with batched (multi-step) rendering
 """
-from typing import Self, Sequence, Mapping, MutableMapping
+from typing import Self
+from collections.abc import Sequence, Mapping, MutableMapping
 import copy
 import logging
 from collections import defaultdict
diff --git a/masque/builder/tools.py b/masque/builder/tools.py
index 1b7a74f..0c6af12 100644
--- a/masque/builder/tools.py
+++ b/masque/builder/tools.py
@@ -3,7 +3,8 @@ Tools are objects which dynamically generate simple single-use devices (e.g. wir
 
 # TODO document all tools
 """
-from typing import Sequence, Literal, Callable, Any
+from typing import Literal, Any
+from collections.abc import Sequence, Callable
 from abc import ABCMeta  # , abstractmethod     # TODO any way to make Tool ok with implementing only one method?
 from dataclasses import dataclass
 
diff --git a/masque/builder/utils.py b/masque/builder/utils.py
index 51d5e8b..ae2f564 100644
--- a/masque/builder/utils.py
+++ b/masque/builder/utils.py
@@ -1,4 +1,5 @@
-from typing import Mapping, Sequence, SupportsFloat, cast, TYPE_CHECKING
+from typing import SupportsFloat, cast, TYPE_CHECKING
+from collections.abc import Mapping, Sequence
 from pprint import pformat
 
 import numpy
diff --git a/masque/file/dxf.py b/masque/file/dxf.py
index 31582b7..e665e89 100644
--- a/masque/file/dxf.py
+++ b/masque/file/dxf.py
@@ -6,7 +6,8 @@ Notes:
  * ezdxf sets creation time, write time, $VERSIONGUID, and $FINGERPRINTGUID
     to unique values, so byte-for-byte reproducibility is not achievable for now
 """
-from typing import Any, Callable, Mapping, cast, TextIO, IO
+from typing import Any, cast, TextIO, IO
+from collections.abc import Mapping, Callable
 import io
 import logging
 import pathlib
diff --git a/masque/file/gdsii.py b/masque/file/gdsii.py
index 4dce32c..78c1b1a 100644
--- a/masque/file/gdsii.py
+++ b/masque/file/gdsii.py
@@ -19,7 +19,8 @@ Notes:
  * GDS creation/modification/access times are set to 1900-01-01 for reproducibility.
  * Gzip modification time is set to 0 (start of current epoch, usually 1970-01-01)
 """
-from typing import Callable, Iterable, Mapping, IO, cast, Any
+from typing import IO, cast, Any
+from collections.abc import Iterable, Mapping, Callable
 import io
 import mmap
 import logging
diff --git a/masque/file/oasis.py b/masque/file/oasis.py
index befa325..1424004 100644
--- a/masque/file/oasis.py
+++ b/masque/file/oasis.py
@@ -14,7 +14,8 @@ Note that OASIS references follow the same convention as `masque`,
 Notes:
  * Gzip modification time is set to 0 (start of current epoch, usually 1970-01-01)
 """
-from typing import Any, Callable, Iterable, IO, Mapping, cast, Sequence
+from typing import Any, IO, cast
+from collections.abc import Sequence, Iterable, Mapping, Callable
 import logging
 import pathlib
 import gzip
diff --git a/masque/file/svg.py b/masque/file/svg.py
index baf2252..4ff18c5 100644
--- a/masque/file/svg.py
+++ b/masque/file/svg.py
@@ -1,7 +1,7 @@
 """
 SVG file format readers and writers
 """
-from typing import Mapping
+from collections.abc import Mapping
 import warnings
 
 import numpy
diff --git a/masque/file/utils.py b/masque/file/utils.py
index 898bd05..2d072e7 100644
--- a/masque/file/utils.py
+++ b/masque/file/utils.py
@@ -1,7 +1,8 @@
 """
 Helper functions for file reading and writing
 """
-from typing import IO, Iterator, Mapping
+from typing import IO
+from collections.abc import Iterator, Mapping
 import re
 import pathlib
 import logging
diff --git a/masque/library.py b/masque/library.py
index 1358198..86c22ae 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -15,7 +15,7 @@ Classes include:
     library. Generated with `ILibraryView.abstract_view()`.
 """
 from typing import Callable, Self, Type, TYPE_CHECKING, cast, TypeAlias, Protocol, Literal
-from typing import Iterator, Mapping, MutableMapping, Sequence
+from collections.abc import Iterator, Mapping, MutableMapping, Sequence, Callable
 import logging
 import base64
 import struct
diff --git a/masque/pattern.py b/masque/pattern.py
index 614124a..a0fb58e 100644
--- a/masque/pattern.py
+++ b/masque/pattern.py
@@ -2,7 +2,8 @@
   Object representing a one multi-layer lithographic layout.
   A single level of hierarchical references is included.
 """
-from typing import Callable, Sequence, cast, Mapping, Self, Any, Iterable, TypeVar, MutableMapping
+from typing import cast, Self, Any, TypeVar
+from collections.abc import Sequence, Mapping, MutableMapping, Iterable, Callable
 import copy
 import logging
 import functools
diff --git a/masque/ports.py b/masque/ports.py
index 9ee58f5..a7b2594 100644
--- a/masque/ports.py
+++ b/masque/ports.py
@@ -1,4 +1,5 @@
-from typing import Iterable, KeysView, ValuesView, overload, Self, Mapping, NoReturn, Any
+from typing import overload, Self, NoReturn, Any
+from collections.abc import Iterable, KeysView, ValuesView, Mapping
 import warnings
 import traceback
 import logging
diff --git a/masque/ref.py b/masque/ref.py
index 9c9c519..b84114b 100644
--- a/masque/ref.py
+++ b/masque/ref.py
@@ -2,7 +2,8 @@
  Ref provides basic support for nesting Pattern objects within each other.
  It carries offset, rotation, mirroring, and scaling data for each individual instance.
 """
-from typing import Mapping, TYPE_CHECKING, Self, Any
+from typing import TYPE_CHECKING, Self, Any
+from collections.abc import Mapping
 import copy
 import functools
 
diff --git a/masque/shapes/path.py b/masque/shapes/path.py
index d87286a..67f750e 100644
--- a/masque/shapes/path.py
+++ b/masque/shapes/path.py
@@ -1,4 +1,5 @@
-from typing import Sequence, Any, cast
+from typing import Any, cast
+from collections.abc import Sequence
 import copy
 import functools
 from enum import Enum
diff --git a/masque/shapes/polygon.py b/masque/shapes/polygon.py
index 144371b..d36e5b5 100644
--- a/masque/shapes/polygon.py
+++ b/masque/shapes/polygon.py
@@ -1,4 +1,5 @@
-from typing import Sequence, Any, cast
+from typing import Any, cast
+from collections.abc import Sequence
 import copy
 import functools
 
diff --git a/masque/shapes/shape.py b/masque/shapes/shape.py
index a1c4bcd..acdd266 100644
--- a/masque/shapes/shape.py
+++ b/masque/shapes/shape.py
@@ -1,4 +1,5 @@
-from typing import Callable, TYPE_CHECKING, Any
+from typing import TYPE_CHECKING, Any
+from collections.abc import Callable
 from abc import ABCMeta, abstractmethod
 
 import numpy
diff --git a/masque/utils/decorators.py b/masque/utils/decorators.py
index c212cdd..9ae7650 100644
--- a/masque/utils/decorators.py
+++ b/masque/utils/decorators.py
@@ -1,4 +1,4 @@
-from typing import Callable
+from collections.abc import Callable
 from functools import wraps
 
 from ..error import OneShotError
diff --git a/masque/utils/deferreddict.py b/masque/utils/deferreddict.py
index b6471e5..aff3bcc 100644
--- a/masque/utils/deferreddict.py
+++ b/masque/utils/deferreddict.py
@@ -1,4 +1,5 @@
-from typing import Callable, TypeVar, Generic
+from typing import TypeVar, Generic
+from collections.abc import Callable
 from functools import lru_cache
 
 
diff --git a/masque/utils/pack2d.py b/masque/utils/pack2d.py
index ed6c4b5..50b78d5 100644
--- a/masque/utils/pack2d.py
+++ b/masque/utils/pack2d.py
@@ -1,7 +1,7 @@
 """
 2D bin-packing
 """
-from typing import Sequence, Callable, Mapping
+from collections.abc import Sequence, Mapping, Callable
 
 import numpy
 from numpy.typing import NDArray, ArrayLike
diff --git a/masque/utils/ports2data.py b/masque/utils/ports2data.py
index 2843e0d..1092b7a 100644
--- a/masque/utils/ports2data.py
+++ b/masque/utils/ports2data.py
@@ -6,7 +6,7 @@ and retrieving it (`data_to_ports`).
 the port locations. This particular approach is just a sensible default; feel free to
 to write equivalent functions for your own format or alternate storage methods.
 """
-from typing import Sequence, Mapping
+from collections.abc import Sequence, Mapping
 import logging
 from itertools import chain
 
diff --git a/masque/utils/transform.py b/masque/utils/transform.py
index c50a21c..3071d99 100644
--- a/masque/utils/transform.py
+++ b/masque/utils/transform.py
@@ -1,7 +1,7 @@
 """
 Geometric transforms
 """
-from typing import Sequence
+from collections.abc import Sequence
 from functools import lru_cache
 
 import numpy