diff --git a/.github/workflows/run_pytests.yaml b/.github/workflows/run_pytests.yaml
index 5e2d82e..6445ef7 100644
--- a/.github/workflows/run_pytests.yaml
+++ b/.github/workflows/run_pytests.yaml
@@ -27,8 +27,6 @@ jobs:
             python-version: "3.9"
           - os: ubuntu-latest
             python-version: "3.8"
-          - os: ubuntu-latest
-            python-version: "3.7"
     steps:
       - name: Checkout TiffSlide
         uses: actions/checkout@v3
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f7e2655..8da9242 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,25 +6,25 @@ repos:
   - id: end-of-file-fixer
   - id: check-added-large-files
 - repo: https://github.com/asottile/pyupgrade
-  rev: v3.3.1
+  rev: v3.9.0
   hooks:
   - id: pyupgrade
-    args: [--py37-plus]
+    args: [--py38-plus]
 - repo: https://github.com/pycqa/isort
   rev: 5.12.0
   hooks:
   - id: isort
 - repo: https://github.com/psf/black
-  rev: 23.1.0
+  rev: 23.3.0
   hooks:
   - id: black
     language_version: python3
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: 'v1.0.1'
+  rev: 'v1.4.1'
   hooks:
   - id: mypy
     additional_dependencies: ["numpy"]
-    exclude: ^examples/
+    exclude: ^examples/|^tiffslide/tests/
 - repo: https://github.com/PyCQA/flake8
   rev: '6.0.0'
   hooks:
@@ -34,7 +34,7 @@ repos:
     language_version: python3
     exclude: "^(build|docs|setup.py)|tests[/]"
 - repo: https://github.com/PyCQA/bandit
-  rev: '1.7.4'
+  rev: '1.7.5'
   hooks:
   - id: bandit
     args: ["--ini", ".bandit", "-lll"]
diff --git a/setup.cfg b/setup.cfg
index 8146f60..5b0415d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -15,11 +15,11 @@ classifiers =
     License :: OSI Approved :: BSD License
     Programming Language :: Python
     Programming Language :: Python :: 3 :: Only
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Topic :: Scientific/Engineering
     Topic :: Scientific/Engineering :: Information Analysis
     Topic :: Scientific/Engineering :: Bio-Informatics
@@ -32,7 +32,7 @@ classifiers =
 
 [options]
 packages = find:
-python_requires = >=3.7
+python_requires = >=3.8
 install_requires =
     imagecodecs
     fsspec!=2022.11.0,!=2023.1.0
diff --git a/tiffslide/_compat.py b/tiffslide/_compat.py
index 9afe8a4..ad699d6 100644
--- a/tiffslide/_compat.py
+++ b/tiffslide/_compat.py
@@ -13,14 +13,10 @@
 from types import TracebackType
 from typing import TYPE_CHECKING
 from typing import Any
+from typing import Literal
 from typing import Mapping
 from typing import Sequence
 
-if sys.version_info >= (3, 8):
-    from typing import Literal
-else:
-    from typing_extensions import Literal
-
 import numpy as np
 import zarr
 from imagecodecs import __version__ as _imagecodecs_version
diff --git a/tiffslide/_kerchunk.py b/tiffslide/_kerchunk.py
index 9a0d66e..e5b9ba0 100644
--- a/tiffslide/_kerchunk.py
+++ b/tiffslide/_kerchunk.py
@@ -13,11 +13,7 @@
 from io import StringIO
 from typing import TYPE_CHECKING
 from typing import Any
-
-if sys.version_info >= (3, 8):
-    from typing import TypedDict
-else:
-    from typing_extensions import TypedDict
+from typing import TypedDict
 
 import fsspec
 from imagecodecs.numcodecs import register_codecs
diff --git a/tiffslide/_pycompat.py b/tiffslide/_pycompat.py
deleted file mode 100644
index f1c79ab..0000000
--- a/tiffslide/_pycompat.py
+++ /dev/null
@@ -1,151 +0,0 @@
-"""python3.7 compatibility code
-
-This will be removed as soon as we drop python 3.7
-
-"""
-from __future__ import annotations
-
-import re
-import sys
-from threading import RLock
-from typing import Any
-from typing import Callable
-from typing import Generic
-from typing import Iterator
-from typing import Mapping
-from typing import TypeVar
-
-import zarr
-from tifffile import __version__ as tifffile_version
-
-__all__ = [
-    "REQUIRES_STORE_FIX",
-    "py37_fix_store",
-    "cached_property",
-]
-
-
-def _requires_store_fix(ver_zarr: str, ver_tifffile: str) -> bool:
-    _v_regex = re.compile(r"^([0-9]+)[.]([0-9]+)[.]([0-9]+)(a|b|rc)?([0-9]+)?$")
-    _v_map = {"a": 0, "b": 1, "rc": 2, None: 99}
-
-    mz = _v_regex.match(ver_zarr)
-    mt = _v_regex.match(ver_tifffile)
-    if mz is None or mt is None:
-        return True
-
-    _ver_zarr: list[int] = [
-        int(x) if x and x.isdigit() else _v_map[x] for x in mz.groups()
-    ]
-    _ver_tifffile: list[int] = [
-        int(x) if x and x.isdigit() else _v_map[x] for x in mt.groups()
-    ]
-
-    _new_zarr = _ver_zarr >= [2, 11, 0, 99, 99]
-    _old_tifffile = _ver_tifffile < [2022, 3, 29, 99, 99]
-    return _new_zarr and _old_tifffile
-
-
-REQUIRES_STORE_FIX = _requires_store_fix(zarr.__version__, tifffile_version)
-
-
-# --- zarr - tifffile compatibility patches ---------------------------
-#
-# note: we can drop this once we drop python 3.7
-
-
-class _IncompatibleStoreShim(Mapping[str, Any]):
-    """
-    A compatibility shim, for python=3.7
-    with zarr>=2.11.0 with tifffile<2022.3.29
-    """
-
-    def __init__(self, mapping: Mapping[str, Any]) -> None:
-        self._mutable_mapping = mapping
-
-    def __getitem__(self, key: str) -> Any:
-        if key.endswith((".zarray", ".zgroup")) and key not in self._mutable_mapping:
-            raise KeyError(key)
-        try:
-            return self._mutable_mapping[key]
-        except ValueError:
-            raise KeyError(key)
-
-    def __iter__(self) -> Iterator[str]:
-        return iter(self._mutable_mapping)
-
-    def __len__(self) -> int:
-        return len(self._mutable_mapping)
-
-    def __getattr__(self, item: str) -> Any:
-        return getattr(self._mutable_mapping, item)
-
-
-def py37_fix_store(zstore: Mapping[str, Any]) -> Mapping[str, Any]:
-    """python 3.7 compatibility fix for tifffile and zarr"""
-    if REQUIRES_STORE_FIX:
-        return _IncompatibleStoreShim(zstore)
-    else:
-        return zstore
-
-
-if sys.version_info < (3, 8):
-    # --- vendored cached_property from CPython with added type information ---
-
-    _T = TypeVar("_T")
-    _NOT_FOUND = object()
-
-    class cached_property(Generic[_T]):
-        def __init__(self, func: Callable[..., _T]) -> None:
-            self.func = func
-            self.attrname = None
-            self.__doc__ = func.__doc__
-            self.lock = RLock()
-
-        def __set_name__(self, owner, name):  # type: ignore
-            if self.attrname is None:
-                self.attrname = name
-            elif name != self.attrname:
-                raise TypeError(
-                    "Cannot assign the same cached_property to two different names "
-                    f"({self.attrname!r} and {name!r})."
-                )
-
-        def __get__(self, instance: Any, owner: type[Any] | None = None) -> _T:
-            if instance is None:
-                return self  # type: ignore
-            if self.attrname is None:
-                raise TypeError(
-                    "Cannot use cached_property instance without calling __set_name__ on it."
-                )
-            try:
-                cache = instance.__dict__
-            except (
-                AttributeError
-            ):  # not all objects have __dict__ (e.g. class defines slots)
-                msg = (
-                    f"No '__dict__' attribute on {type(instance).__name__!r} "
-                    f"instance to cache {self.attrname!r} property."
-                )
-                raise TypeError(msg) from None
-            val = cache.get(self.attrname, _NOT_FOUND)
-            if val is _NOT_FOUND:
-                with self.lock:
-                    # check if another thread filled cache while we awaited lock
-                    val = cache.get(self.attrname, _NOT_FOUND)
-                    if val is _NOT_FOUND:
-                        val = self.func(instance)
-                        try:
-                            cache[self.attrname] = val
-                        except TypeError:
-                            msg = (
-                                f"The '__dict__' attribute on {type(instance).__name__!r} instance "
-                                f"does not support item assignment for caching {self.attrname!r} property."
-                            )
-                            raise TypeError(msg) from None
-            return val
-
-        # __class_getitem__ = classmethod(GenericAlias)
-
-else:
-    from functools import cached_property
diff --git a/tiffslide/_types.py b/tiffslide/_types.py
index 542ee7b..663c661 100644
--- a/tiffslide/_types.py
+++ b/tiffslide/_types.py
@@ -6,17 +6,10 @@
 from typing import IO
 from typing import TYPE_CHECKING
 from typing import Any
+from typing import Protocol
+from typing import TypedDict
 from typing import Union
-
-if sys.version_info >= (3, 8):
-    from typing import Protocol
-    from typing import TypedDict
-    from typing import runtime_checkable
-
-else:
-    from typing_extensions import Protocol
-    from typing_extensions import TypedDict
-    from typing_extensions import runtime_checkable
+from typing import runtime_checkable
 
 if sys.version_info >= (3, 10):
     from typing import TypeAlias
diff --git a/tiffslide/_zarr.py b/tiffslide/_zarr.py
index 104ef5b..758b5a7 100644
--- a/tiffslide/_zarr.py
+++ b/tiffslide/_zarr.py
@@ -4,12 +4,10 @@
 from __future__ import annotations
 
 import json
-import sys
 from typing import TYPE_CHECKING
 from typing import Any
 from typing import Iterator
 from typing import Mapping
-from warnings import warn
 
 import numpy as np
 import zarr
@@ -19,8 +17,6 @@
 from zarr.storage import FSStore
 
 from tiffslide._compat import NotTiffFile
-from tiffslide._pycompat import REQUIRES_STORE_FIX
-from tiffslide._pycompat import py37_fix_store
 from tiffslide._types import Point3D
 from tiffslide._types import SeriesCompositionInfo
 from tiffslide._types import Size3D
@@ -42,12 +38,6 @@
     "get_zarr_selection",
 ]
 
-if REQUIRES_STORE_FIX and sys.version_info >= (3, 8):
-    warn(
-        "detected outdated tifffile version on `python>=3.8` with `zarr>=2.11.0`: "
-        "updating tifffile is recommended!"
-    )
-
 
 # --- zarr storage classes --------------------------------------------
 
@@ -120,8 +110,6 @@ def _get_series_zarr(
         zstore = FSStore(f"s{series_idx}", fs=obj)
     else:
         raise NotImplementedError(f"{type(obj).__name__} unsupported")
-    if REQUIRES_STORE_FIX:
-        zstore = py37_fix_store(zstore)
     return zstore  # type: ignore
 
 
@@ -302,7 +290,7 @@ def get_zarr_chunk_sizes(
     except AttributeError:
         raise RuntimeError("probably not supported with your tifffile version")
 
-    chunk_sizes = np.full(chunked, dtype=np.int64, fill_value=-1)
+    chunk_sizes: NDArray[np.int64] = np.full(chunked, dtype=np.int64, fill_value=-1)
 
     # _index = ""
     for indices in np.ndindex(*chunked):
diff --git a/tiffslide/tests/conftest.py b/tiffslide/tests/conftest.py
index 1053229..4429ada 100644
--- a/tiffslide/tests/conftest.py
+++ b/tiffslide/tests/conftest.py
@@ -179,13 +179,10 @@ def gen_im(size_hw):
     mpp = 0.25
     mag = 40
     filename = "ASD"
-    if sys.version_info >= (3, 8):
-        resolution_kw = {
-            "resolution": (10000 / mpp, 10000 / mpp),
-            "resolutionunit": "CENTIMETER",
-        }
-    else:
-        resolution_kw = {"resolution": (10000 / mpp, 10000 / mpp, "CENTIMETER")}
+    resolution_kw = {
+        "resolution": (10000 / mpp, 10000 / mpp),
+        "resolutionunit": "CENTIMETER",
+    }
 
     # write to svs format
     with tifffile.TiffWriter(pth, bigtiff=True) as tif:
diff --git a/tiffslide/tests/test_pycompat.py b/tiffslide/tests/test_pycompat.py
deleted file mode 100644
index fa02b12..0000000
--- a/tiffslide/tests/test_pycompat.py
+++ /dev/null
@@ -1,17 +0,0 @@
-import pytest
-
-from tiffslide._pycompat import _requires_store_fix
-
-
-@pytest.mark.parametrize(
-    "vz,vt,fix",
-    [
-        ("2.11.0", "2022.3.29rc7", True),
-        ("2.10.1a3", "2022.3.29", False),
-        ("2.12.0", "2022.4.0", False),
-        ("2.13.0rc1", "2022.12.0", False),
-        ("2.11.3b1", "2022.2.11", True),
-    ],
-)
-def test_requires_fix(vz, vt, fix):
-    assert _requires_store_fix(vz, vt) == fix
diff --git a/tiffslide/tiffslide.py b/tiffslide/tiffslide.py
index 60ea2df..6120a98 100644
--- a/tiffslide/tiffslide.py
+++ b/tiffslide/tiffslide.py
@@ -5,28 +5,19 @@
 import sys
 from collections import defaultdict
 from fractions import Fraction
+from functools import cached_property
 from itertools import count
 from types import TracebackType
 from typing import TYPE_CHECKING
 from typing import Any
 from typing import Iterator
+from typing import Literal
 from typing import Mapping
 from typing import TypeVar
 from typing import overload
 from warnings import warn
 from xml.etree import ElementTree
 
-from tifffile import TiffPage
-
-from tiffslide._types import Slice3D
-
-if sys.version_info[:2] >= (3, 8):
-    from functools import cached_property
-    from typing import Literal
-else:
-    from tiffslide._pycompat import cached_property
-    from typing_extensions import Literal
-
 import numpy as np
 import tifffile
 import zarr
@@ -36,6 +27,7 @@
 from PIL import Image
 from tifffile import TiffFile
 from tifffile import TiffFileError as TiffFileError
+from tifffile import TiffPage
 from tifffile import TiffPageSeries
 from tifffile.tifffile import svs_description_metadata
 
@@ -43,6 +35,7 @@
 from tiffslide._types import OpenFileLike
 from tiffslide._types import PathOrFileOrBufferLike
 from tiffslide._types import SeriesCompositionInfo
+from tiffslide._types import Slice3D
 from tiffslide._types import TiffFileIO
 from tiffslide._zarr import get_zarr_depth_and_dtype
 from tiffslide._zarr import get_zarr_selection