diff --git a/pyproject.toml b/pyproject.toml
index ae820e205..6294ea76d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ dependencies = [
 dev = [
     "pytest>=9.1.1,<10",
     "black>=26.5.1",
-    "ruff>=0.15.18",
+    "ruff>=0.15.21",
     "mypy>=2.3.0",
     "types-requests>=2.33.0.20260518",
     "pre-commit>=4.6.0",