diff --git a/cubed/primitive/memory.py b/cubed/primitive/memory.py
index 8c49f22aa..d7ae67586 100644
--- a/cubed/primitive/memory.py
+++ b/cubed/primitive/memory.py
@@ -16,7 +16,7 @@ class BufferCopies:
     """The number of copies made when writing an array to storage."""
 
 
-def get_buffer_copies(spec: Optional[Spec]):
+def get_buffer_copies(spec: Optional[Spec]) -> BufferCopies:
     """Return the number of buffer copies to use, based on the spec.
 
     Using cloud storage will result in more buffer copies being accounted for.
@@ -84,10 +84,10 @@ class MemoryModeller:
     current_mem: int = 0
     peak_mem: int = 0
 
-    def allocate(self, num_bytes):
+    def allocate(self, num_bytes: int) -> None:
         self.current_mem += num_bytes
         self.peak_mem = max(self.peak_mem, self.current_mem)
 
-    def free(self, num_bytes):
+    def free(self, num_bytes: int) -> None:
         self.current_mem -= num_bytes
         self.peak_mem = max(self.peak_mem, self.current_mem)
diff --git a/cubed/utils.py b/cubed/utils.py
index f7946ecac..5878d406a 100644
--- a/cubed/utils.py
+++ b/cubed/utils.py
@@ -1,7 +1,6 @@
 import collections
 import inspect
 import itertools
-import numbers
 import platform
 import sys
 import sysconfig
@@ -386,8 +385,8 @@ def normalize_shape(shape: Union[int, Tuple[int, ...], None]) -> Tuple[int, ...]
     if shape is None:
         raise TypeError("shape is None")
 
-    if isinstance(shape, numbers.Integral):
-        shape = (int(shape),)
+    if isinstance(shape, int):
+        shape = (shape,)
 
     shape = cast(Tuple[int, ...], shape)
     shape = tuple(int(s) for s in shape)
diff --git a/pyproject.toml b/pyproject.toml
index e253f0549..53828884c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -146,3 +146,22 @@ known-third-party = [
     "toolz",
     "zarr",
 ]
+
+[tool.mypy]
+files = "cubed"
+python_version = "3.11"
+strict = false
+enable_error_code = ["truthy-bool"]
+ignore_missing_imports = true
+allow_redefinition= true
+exclude = [
+  "cubed/array_api",
+  "cubed/tests",
+  "cubed/vendor",
+  "docs"
+]
+
+[[tool.mypy.overrides]]
+# Ignore vendored libraries
+module = [ "cubed.array_api.*", "cubed.vendor.*", ]
+ignore_errors = true
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 51c35ec15..000000000
--- a/setup.cfg
+++ /dev/null
@@ -1,87 +0,0 @@
-[mypy]
-exclude = tests|doc
-files = .
-show_error_codes = True
-allow_redefinition = True
-
-# Ignore vendored libraries
-[mypy-cubed.vendor.*]
-ignore_errors = True
-
-# Most of the numerical computing stack doesn't have type annotations yet.
-[mypy-anywidget.*]
-ignore_missing_imports = True
-[mypy-apache_beam.*]
-ignore_missing_imports = True
-[mypy-aiostream.*]
-ignore_missing_imports = True
-[mypy-array_api_compat.*]
-ignore_missing_imports = True
-[mypy-cloudpickle.*]
-ignore_missing_imports = True
-[mypy-coiled.*]
-ignore_missing_imports = True
-[mypy-cupy.*]
-ignore_missing_imports = True
-[mypy-dask.*]
-ignore_missing_imports = True
-[mypy-donfig.*]
-ignore_missing_imports = True
-[mypy-distributed.*]
-ignore_missing_imports = True
-[mypy-fsspec.*]
-ignore_missing_imports = True
-[mypy-icechunk.*]
-ignore_missing_imports = True
-[mypy-ipywidgets.*]
-ignore_missing_imports = True
-[mypy-IPython.*]
-ignore_missing_imports = True
-[mypy-lithops.*]
-ignore_missing_imports = True
-[mypy-memray.*]
-ignore_missing_imports = True
-[mypy-modal.*]
-ignore_missing_imports = True
-[mypy-matplotlib.*]
-ignore_missing_imports = True
-[mypy-ndindex.*]
-ignore_missing_imports = True
-[mypy-networkx.*]
-ignore_missing_imports = True
-[mypy-numcodecs.*]
-ignore_missing_imports = True
-[mypy-numpy.*]
-ignore_missing_imports = True
-[mypy-obstore.*]
-ignore_missing_imports = True
-[mypy-pandas.*]
-ignore_missing_imports = True
-[mypy-psutil.*]
-ignore_missing_imports = True
-[mypy-pytest.*]
-ignore_missing_imports = True
-[mypy-ray.*]
-ignore_missing_imports = True
-[mypy-rechunker.*]
-ignore_missing_imports = True
-[mypy-seaborn.*]
-ignore_missing_imports = True
-[mypy-six.*]
-ignore_missing_imports = True
-[mypy-tenacity.*]
-ignore_missing_imports = True
-[mypy-tensorstore.*]
-ignore_missing_imports = True
-[mypy-tlz.*]
-ignore_missing_imports = True
-[mypy-toolz.*]
-ignore_missing_imports = True
-[mypy-tqdm.*]
-ignore_missing_imports = True
-[mypy-zarr.*]
-ignore_missing_imports = True
-[mypy-zarrs.*]
-ignore_missing_imports = True
-[mypy-pyspark.*]
-ignore_missing_imports = True