diff --git a/pyproject.toml b/pyproject.toml
index 8cc66c7..232ba30 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -80,7 +80,7 @@ dev = [
     "pytest-freezegun (>=0.4.2, <1.0.0)",
     "pytest-httpserver (>=1.1.3, <2.0.0)",
     "pytest-mock (>=3.14.0, <4.0.0)",
-    "setuptools (>=78.1.1, <79.0.0)",
+    "setuptools (>=81.0.0, <81.1.0)",
     "types-python-dateutil (>=2.9.0.20250516, <3.0.0)",
     "types-simplejson (>=3.20.0.20250326, <4.0.0)",
 ]
diff --git a/uv.lock b/uv.lock
index e9ee190..9c27dbc 100644
--- a/uv.lock
+++ b/uv.lock
@@ -493,7 +493,7 @@ dev = [
     { name = "pytest-freezegun", specifier = ">=0.4.2,<1.0.0" },
     { name = "pytest-httpserver", specifier = ">=1.1.3,<2.0.0" },
     { name = "pytest-mock", specifier = ">=3.14.0,<4.0.0" },
-    { name = "setuptools", specifier = ">=78.1.1,<79.0.0" },
+    { name = "setuptools", specifier = ">=81.0.0,<81.1.0" },
     { name = "types-python-dateutil", specifier = ">=2.9.0.20250516,<3.0.0" },
     { name = "types-simplejson", specifier = ">=3.20.0.20250326,<4.0.0" },
 ]
@@ -1487,11 +1487,11 @@ wheels = [
 
 [[package]]
 name = "setuptools"
-version = "78.1.1"
+version = "81.0.0"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/81/9c/42314ee079a3e9c24b27515f9fbc7a3c1d29992c33451779011c74488375/setuptools-78.1.1.tar.gz", hash = "sha256:fcc17fd9cd898242f6b4adfaca46137a9edef687f43e6f78469692a5e70d851d", size = 1368163, upload-time = "2025-04-19T18:23:36.68Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/0d/1c/73e719955c59b8e424d015ab450f51c0af856ae46ea2da83eba51cc88de1/setuptools-81.0.0.tar.gz", hash = "sha256:487b53915f52501f0a79ccfd0c02c165ffe06631443a886740b91af4b7a5845a", size = 1198299, upload-time = "2026-02-06T21:10:39.601Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/90/99/158ad0609729111163fc1f674a5a42f2605371a4cf036d0441070e2f7455/setuptools-78.1.1-py3-none-any.whl", hash = "sha256:c3a9c4211ff4c309edb8b8c4f1cbfa7ae324c4ba9f91ff254e3d305b9fd54561", size = 1256462, upload-time = "2025-04-19T18:23:34.525Z" },
+    { url = "https://files.pythonhosted.org/packages/e1/e3/c164c88b2e5ce7b24d667b9bd83589cf4f3520d97cad01534cd3c4f55fdb/setuptools-81.0.0-py3-none-any.whl", hash = "sha256:fdd925d5c5d9f62e4b74b30d6dd7828ce236fd6ed998a08d81de62ce5a6310d6", size = 1062021, upload-time = "2026-02-06T21:10:37.175Z" },
 ]
 
 [[package]]