diff --git a/.ruff.toml b/.ruff.toml
index 58583973..ab42bb65 100644
--- a/.ruff.toml
+++ b/.ruff.toml
@@ -17,9 +17,10 @@ select = [
   "N", # pep8-naming
   "PIE", # flake8-pie
   "PGH", # pygrep-hooks
-  "SLF", # flake8-self
   "RET", # flake8-return
   "RUF100", # unused noqa (yesqa)
+  "SLF", # flake8-self
+  "SIM", # flake8-simplify
   "T10", # flake8-debugger
   "UP", # pyupgrade
   "W", # pycodestyle warnings
diff --git a/latest.py b/latest.py
index 36b31db3..4ee0b89c 100644
--- a/latest.py
+++ b/latest.py
@@ -117,7 +117,7 @@ class Product:
     def check_latest(self) -> None:
         for release in self.releases:
             latest = release.latest()
-            if release.matched and latest not in self.versions.keys():
+            if release.matched and latest not in self.versions:
                 logging.info(f"latest version {latest} for {release.name} not found in {self.versions_path}")
 
     def process_version(self, version: str, date_str: str) -> None:
diff --git a/src/apple.py b/src/apple.py
index 74c35833..9e1ea413 100644
--- a/src/apple.py
+++ b/src/apple.py
@@ -55,7 +55,7 @@ print("::group::apple")
 soups = [BeautifulSoup(response.text, features="html5lib") for response in http.fetch_urls(URLS)]
 print("::endgroup::")
 
-for product_name in VERSION_PATTERNS.keys():
+for product_name in VERSION_PATTERNS:
     product = endoflife.Product(product_name)
     print(f"::group::{product.name}")
 
diff --git a/src/common/endoflife.py b/src/common/endoflife.py
index 9346f428..0998d729 100644
--- a/src/common/endoflife.py
+++ b/src/common/endoflife.py
@@ -59,7 +59,7 @@ class ProductFrontmatter:
 
         if "auto" in self.data:
             for config in self.data["auto"]:
-                if method in config.keys():
+                if method in config:
                     configs.append(AutoConfig(method, config))
                 else:
                     logging.error(f"mixed auto-update methods declared for {self.name}, this is not yet supported")
@@ -154,7 +154,7 @@ def list_products(method: str, products_filter: str = None) -> list[str]:
         with open(product_file) as f:
             data = frontmatter.load(f)
             if "auto" in data:
-                matching_configs = list(filter(lambda config: method in config.keys(), data["auto"]))
+                matching_configs = list(filter(lambda config: method in config, data["auto"]))
                 if len(matching_configs) > 0:
                     products.append(product_name)