diff --git a/pyproject.toml b/pyproject.toml
index f23aebfa..d51e5536 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,7 +43,7 @@ test = [
     "pyserial-asyncio-fast==0.14",
     "pytest==8.3.4",
     "pytest-asyncio==0.24.0",
-    "ruff==0.8.1",
+    "ruff==0.8.5",
     "tox==4.23.2",
     "types-pyserial==3.5.0.20240826"
 ]
diff --git a/requirements_test.txt b/requirements_test.txt
index d0189eab..3d8f8dff 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -5,7 +5,7 @@ pre-commit==4.0.1
 pyserial-asyncio-fast==0.14
 pytest-asyncio==0.24.0
 pytest==8.3.4
-ruff==0.8.1
+ruff==0.8.5
 tomli==2.2.1
 tox==4.23.2
 types-pyserial==3.5.0.20240826