diff --git a/pyproject.toml b/pyproject.toml
index 224bb8a5..0db9a007 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,7 @@
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
+
 [project]
 name = "numtype"
 version = "2.2.2.0.dev0"
@@ -29,7 +30,6 @@ requires-python = ">=3.10"
 packages = [{include = "src/numpy-stubs"}]
 dependencies = []
 
-
     [project.optional-dependencies]
     numpy = ["numpy>=2.2.2,<2.3"]
 
@@ -47,8 +47,7 @@ dev = [
     "libcst>=1.6.0",
     "ruff>=0.9.5",
     "mypy[faster-cache]>=1.15.0",
-    # "basedmypy[faster-cache]>=2.9.1",
-    "basedpyright>=1.26.0",
+    "basedpyright>=1.27.0",
     "pytest>=8.3.4",
 ]
 
@@ -69,6 +68,7 @@ packages = ["src/numpy-stubs"]
         "uv.lock",
     ]
 
+
 [tool.mypy]
 python_version = "3.10"
 mypy_path = "src"
@@ -82,8 +82,6 @@ strict = true
 strict_bytes = true
 strict_concatenate = true
 local_partial_types = true
-# disable_bytearray_promotion = true
-# disable_memoryview_promotion = true
 enable_error_code = ["ignore-without-code", "truthy-bool"]
 disable_error_code = ["explicit-override"]
 enable_incomplete_feature = ["PreciseTupleTypes"]
diff --git a/uv.lock b/uv.lock
index 032df624..5cbb470a 100644
--- a/uv.lock
+++ b/uv.lock
@@ -3,14 +3,14 @@ requires-python = ">=3.10"
 
 [[package]]
 name = "basedpyright"
-version = "1.26.0"
+version = "1.27.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "nodejs-wheel-binaries" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/18/c2/5685d040d4f2598788d42bfd2db5f808e9aa2eaee77fcae3c2fbe4ea0e7c/basedpyright-1.26.0.tar.gz", hash = "sha256:5e01f6eb9290a09ef39672106cf1a02924fdc8970e521838bc502ccf0676f32f", size = 24932771 }
+sdist = { url = "https://files.pythonhosted.org/packages/24/d6/13b8c68628ec477a0845e0cb1b653576f4b27cd56aa5b34e773d27b191f1/basedpyright-1.27.0.tar.gz", hash = "sha256:7394c6f8eb08bc8c45caeb00f75bc815b518d1345e25436ae3046b93ba1ddbb0", size = 21496620 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/8e/72/65308f45bb73efc93075426cac5f37eea937ae364aa675785521cb3512c7/basedpyright-1.26.0-py3-none-any.whl", hash = "sha256:5a6a17f2c389ec313dd2c3644f40e8221bc90252164802e626055341c0a37381", size = 11504579 },
+    { url = "https://files.pythonhosted.org/packages/23/da/b90aa61886be7a8eb553ec8816e25e1ec06d25178092be5d5404eac74fdc/basedpyright-1.27.0-py3-none-any.whl", hash = "sha256:4c71641ab808ca5a30fa1df26c9842b870b08847696a8a5f9072a6a4e914542d", size = 11523095 },
 ]
 
 [[package]]
@@ -237,7 +237,7 @@ requires-dist = [{ name = "numpy", marker = "extra == 'numpy'", specifier = ">=2
 
 [package.metadata.requires-dev]
 dev = [
-    { name = "basedpyright", specifier = ">=1.26.0" },
+    { name = "basedpyright", specifier = ">=1.27.0" },
     { name = "libcst", specifier = ">=1.6.0" },
     { name = "mypy", extras = ["faster-cache"], specifier = ">=1.15.0" },
     { name = "numtype", extras = ["numpy"] },