diff --git a/pyproject.toml b/pyproject.toml
index deb191b..7ca8512 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ dependencies = [
 dev = [
   "coverage[toml]>=7.15.0,<8",
   "pre-commit>=4.6.0,<5",
-  "ruff>=0.15.20,<1",
+  "ruff>=0.15.21,<1",
 ]
 
 [tool.uv]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8d83e76..9d9282e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
 -r requirements.txt
 coverage[toml]>=7.15.0,<8
 pre-commit>=4.6.0,<5
-ruff>=0.15.20,<1
+ruff>=0.15.21,<1