diff --git a/pyproject.toml b/pyproject.toml
index 9eba77d9..9e78e8d0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -62,7 +62,7 @@ docs = [
   "pydantic-kitbash>=1.0.1,<2.0",
   # Missing from sphinxcontrib-details-directive, see
   # https://github.com/sphinx-contrib/sphinxcontrib-details-directive/issues/5
-  "setuptools<82.0",
+  "setuptools<84.3",
   "sphinx-lint~=1.0",
   "sphinx-pydantic==0.1.1",
   "sphinxcontrib-details-directive",
diff --git a/uv.lock b/uv.lock
index 03f8846a..ec16f16a 100644
--- a/uv.lock
+++ b/uv.lock
@@ -980,7 +980,7 @@ docs = [
     { name = "packaging", specifier = "~=26.1" },
     { name = "pydantic-kitbash", specifier = ">=1.0.1,<2.0" },
     { name = "rst2html", specifier = ">=2020.7.4" },
-    { name = "setuptools", specifier = "<82.0" },
+    { name = "setuptools", specifier = "<84.3" },
     { name = "sphinx-autobuild", specifier = ">=2024.10.3" },
     { name = "sphinx-design", specifier = "==0.6.1" },
     { name = "sphinx-lint", specifier = "~=1.0" },
@@ -2342,11 +2342,11 @@ wheels = [
 
 [[package]]
 name = "setuptools"
-version = "81.0.0"
+version = "84.2.1"
 source = { registry = "https://pypi.org/simple" }
-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" }
+sdist = { url = "https://files.pythonhosted.org/packages/70/b3/c19426f783614d625699a4b247faf628ea9ab1db228674491767b417f9e1/setuptools-84.2.1.tar.gz", hash = "sha256:3ff8b3b5492a0aa66960f4419365a86b84e013070d4313e4d4a6894f5d64d6bc", size = 1230289, upload-time = "2026-10-20T19:01:37.742Z" }
 wheels = [
-    { 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" },
+    { url = "https://files.pythonhosted.org/packages/ef/55/6dc6d6bb953bdfc52519a0059592c52b6e3b8ad51cf8256dffceb55b0610/setuptools-84.2.1-py3-none-any.whl", hash = "sha256:ca140b45d5325a9478f880e351484f62fef15f336462e449ca0c03c873d589c2", size = 876263, upload-time = "2026-10-20T19:01:35.678Z" },
 ]
 
 [[package]]