diff --git a/prometheuspvesd/config.py b/prometheuspvesd/config.py
index d6b5084..492bdee 100644
--- a/prometheuspvesd/config.py
+++ b/prometheuspvesd/config.py
@@ -20,7 +20,7 @@ cache_dir = AppDirs("prometheus-pve-sd").user_cache_dir
 default_output_file = os.path.join(cache_dir, "pve.json")
 
 
-class Config():
+class Config:
     """
     Create an object with all necessary settings.
 
diff --git a/prometheuspvesd/discovery.py b/prometheuspvesd/discovery.py
index b835b48..bf1f192 100644
--- a/prometheuspvesd/discovery.py
+++ b/prometheuspvesd/discovery.py
@@ -20,7 +20,7 @@ PROPAGATION_TIME = Summary(
 HOST_GAUGE = Gauge("pve_sd_hosts", "Number of hosts discovered by PVE SD")
 
 
-class Discovery():
+class Discovery:
     """Prometheus PVE Service Discovery."""
 
     def __init__(self):
diff --git a/pyproject.toml b/pyproject.toml
index 7d34a93..a208ec5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -112,6 +112,7 @@ ignore = [
     "D203",
     "D212",
     "UP038",
+    "RUF012",
 ]
 line-length = 99
 select = [