diff --git a/changelog.md b/changelog.md
index 2c64bc52..c3344f5c 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,11 @@
+v2.29.1 (2026/10/10)
+==============
+
+Internal
+--------
+* Pin tox's ruff version to match `dev` dependency group.
+
+
 v2.29.0 (2026/10/10)
 ==============
 
diff --git a/pyproject.toml b/pyproject.toml
index 5e4159df..3aa68ef4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -167,7 +167,7 @@ allowlist_externals = ['rm', 'uv']
 
 [tool.tox.env.style]
 skip_install = true
-deps = ['ruff']
+deps = ['ruff~=0.16.5']
 commands = [['ruff', 'check'],
             ['ruff', 'format', '--diff']]