diff --git a/pyproject.toml b/pyproject.toml
index 401a0ae9..ae19a5c0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -102,7 +102,7 @@
     sec-certs = "sec_certs.cli:main"
 
 [tool.ruff]
-  select = [
+  lint.select = [
     "I",   # isort
     "E",   # pycodestyle
     "W",   # pycodestyle
@@ -113,14 +113,14 @@
     "C4",  # comprehensions
     "SIM",
   ]
-  ignore = [
+  lint.ignore = [
     "E501", # line-length, should be handled by ruff format
   ]
   src = ["src", "tests"]
   line-length = 120
   target-version = "py310"
 
-  [tool.ruff.mccabe]
+  [tool.ruff.lint.mccabe]
     max-complexity = 10
 
   [tool.setuptools.package-data]
diff --git a/src/sec_certs/sample/cpe.py b/src/sec_certs/sample/cpe.py
index 5e9e8b65..e8ec29eb 100644
--- a/src/sec_certs/sample/cpe.py
+++ b/src/sec_certs/sample/cpe.py
@@ -32,16 +32,16 @@ def __lt__(self, other: CPEMatchCriteria) -> bool:
 
     @classmethod
     def from_nist_dict(cls, dct: dict[str, Any]) -> CPEMatchCriteria:
-        if dct.get("versionStartIncluding", None):
+        if dct.get("versionStartIncluding"):
             version_start = ("including", dct["versionStartIncluding"])
         elif dct.get("versionStartExcluding"):
             version_start = ("excluding", dct["versionStartExcluding"])
         else:
             version_start = None
 
-        if dct.get("versionEndIncluding", None):
+        if dct.get("versionEndIncluding"):
             version_end = ("including", dct["versionEndIncluding"])
-        elif dct.get("versionEndExcluding", None):
+        elif dct.get("versionEndExcluding"):
             version_end = ("excluding", dct["versionEndExcluding"])
         else:
             version_end = None
diff --git a/src/sec_certs/sample/fips.py b/src/sec_certs/sample/fips.py
index 8e9268cf..26b9833e 100644
--- a/src/sec_certs/sample/fips.py
+++ b/src/sec_certs/sample/fips.py
@@ -53,7 +53,7 @@ def get_web_data_and_algorithms(self) -> tuple[set[str], FIPSCertificate.WebData
     def _build_details_dict(self, details_div: Tag) -> dict[str, Any]:
         def parse_single_detail_entry(key, entry):
             normalized_key = DETAILS_KEY_NORMALIZATION_DICT[key]
-            normalization_func = DETAILS_KEY_TO_NORMALIZATION_FUNCTION.get(normalized_key, None)
+            normalization_func = DETAILS_KEY_TO_NORMALIZATION_FUNCTION.get(normalized_key)
             normalized_entry = (
                 FIPSHTMLParser.normalize_string(entry.text) if not normalization_func else normalization_func(entry)
             )
diff --git a/src/sec_certs/utils/extract.py b/src/sec_certs/utils/extract.py
index 669cbcfc..340ad568 100644
--- a/src/sec_certs/utils/extract.py
+++ b/src/sec_certs/utils/extract.py
@@ -727,8 +727,7 @@ def load_text_file(
 
     whole_text = ""
     whole_text_with_newlines = ""
-    lines_included = 0
-    for line in lines:
+    for lines_included, line in enumerate(lines):
         if limit_max_lines != -1 and lines_included >= limit_max_lines:
             break
 
@@ -736,7 +735,6 @@ def load_text_file(
         line = line.replace("\n", "")
         whole_text += line
         whole_text += line_separator
-        lines_included += 1
 
     return whole_text, whole_text_with_newlines, was_unicode_decode_error