diff --git a/pyproject.toml b/pyproject.toml
index b1854b4..74dd33f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,7 +20,7 @@ dev = [
     "plumbum>=1.8,<3",
     "pytest>=8,<10",
     "pyyaml>=6,<7",
-    "basedpyright>=1.39,<1.40",
+    "basedpyright>=1.40,<1.41",
     "ruff>=0.15,<0.16",
     "pre-commit>=4,<5",
 ]
diff --git a/uv.lock b/uv.lock
index 0992ab7..5a93591 100644
--- a/uv.lock
+++ b/uv.lock
@@ -13,14 +13,14 @@ wheels = [
 
 [[package]]
 name = "basedpyright"
-version = "1.39.8"
+version = "1.40.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "nodejs-wheel-binaries" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/d2/62/8550c75850b2185df984d1de437b4805b039ba856cacbee2966236203133/basedpyright-1.39.8.tar.gz", hash = "sha256:bb1a86d4d71425d52d1501b317fe23d45527baed06bd5d5e1a07cd4b60d07b55", size = 25488230, upload-time = "2026-06-14T09:05:30.177Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/b7/86/d305ea4b2d460a5ff906a759323685199177814d9aa729fd38786619d00a/basedpyright-1.40.0.tar.gz", hash = "sha256:baeccd5831b3aeef6e87a3b70f1f1dd7a50175621c74f01f7fdff2c5cb2aeaf6", size = 24738241, upload-time = "2026-09-07T13:49:17.72Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/f5/94/878454aefe94328ba7ad808ecd63da8311aae1198da46cfb29f5cfe130a8/basedpyright-1.39.8-py3-none-any.whl", hash = "sha256:a79d89928064bd9023d429b50c625d87d023bacc2fe3932ef6c7bd13b5426048", size = 13182726, upload-time = "2026-06-14T09:05:26.368Z" },
+    { url = "https://files.pythonhosted.org/packages/2f/ca/59391b4ebb6fb76ba6b35fcbe630d806b1fc50c0ec701e3638a13c6889b3/basedpyright-1.40.0-py3-none-any.whl", hash = "sha256:2c90524a1f745e18d8921a2c98e047e7b2e4c60bb79385ead355574efd623941", size = 13482368, upload-time = "2026-09-07T13:49:14.661Z" },
 ]
 
 [[package]]
@@ -497,7 +497,7 @@ dev = [
 
 [package.metadata.requires-dev]
 dev = [
-    { name = "basedpyright", specifier = ">=1.39,<1.40" },
+    { name = "basedpyright", specifier = ">=1.40,<1.41" },
     { name = "copier", specifier = ">=9.6,<10" },
     { name = "plumbum", specifier = ">=1.8,<3" },
     { name = "pre-commit", specifier = ">=4,<5" },