diff --git a/.github/linters/.isort.cfg b/.github/linters/.isort.cfg
index f238bf7..a443079 100644
--- a/.github/linters/.isort.cfg
+++ b/.github/linters/.isort.cfg
@@ -1,2 +1,3 @@
 [settings]
 profile = black
+known_first_party = auth,cleanowners,env,markdown_writer
diff --git a/.github/workflows/super-linter.yaml b/.github/workflows/super-linter.yaml
index ad12004..477e73e 100644
--- a/.github/workflows/super-linter.yaml
+++ b/.github/workflows/super-linter.yaml
@@ -41,7 +41,7 @@ jobs:
       - name: Install dependencies
         run: uv sync --frozen
       - name: Lint Code Base
-        uses: super-linter/super-linter@4ce20838b8ab83717e78138c5b3a1407148e0918 # v8.7.0
+        uses: super-linter/super-linter@2da136927bd4a73596db63044b504547c62cb854 # v9.0.0
         env:
           DEFAULT_BRANCH: main
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/Dockerfile b/Dockerfile
index aa61bf6..dc980d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@ RUN uv sync --frozen --no-dev --no-editable \
 
 # Add a simple healthcheck to satisfy container scanners
 HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
-  CMD python3 -c "import os,sys; sys.exit(0 if os.path.exists('/action/workspace/cleanowners.py') else 1)"
+  CMD ["python3", "-c", "import os,sys; sys.exit(0 if os.path.exists('/action/workspace/cleanowners.py') else 1)"]
 
 ENV PYTHONUNBUFFERED=1
 ENV UV_LINK_MODE=copy
diff --git a/cleanowners.py b/cleanowners.py
index 815e23c..d3e9ee1 100644
--- a/cleanowners.py
+++ b/cleanowners.py
@@ -4,9 +4,10 @@
 import re
 import uuid
 
+from github import GithubException, UnknownObjectException
+
 import auth
 import env
-from github import GithubException, UnknownObjectException
 from markdown_writer import write_step_summary, write_to_markdown
 
 
@@ -252,7 +253,7 @@ def main():  # pragma: no cover
                         f" Check write permissions."
                     )
                     continue
-    except Exception as e:  # pylint: disable=broad-exception-caught
+    except Exception as e:  # noqa: BLE001  # pylint: disable=broad-exception-caught
         error_message = str(e)
         print(f"Error: {error_message}")
     finally:
@@ -361,9 +362,7 @@ def get_usernames_from_codeowners(codeowners_file_contents, ignore_teams=True):
                     handle = handle.split()[0]
                     # Identify team handles by the presence of a slash.
                     # Ignore teams because non-org members cannot be in a team.
-                    if ignore_teams and "/" not in handle:
-                        usernames.append(handle)
-                    elif not ignore_teams:
+                    if not ignore_teams or "/" not in handle:
                         usernames.append(handle)
     return usernames
 
@@ -398,7 +397,7 @@ def commit_changes(
     default_branch = repo.default_branch
     default_branch_commit = repo.get_git_ref(f"heads/{default_branch}").object.sha
     front_matter = "refs/heads/"
-    branch_name = f"codeowners-{str(uuid.uuid4())}"
+    branch_name = f"codeowners-{uuid.uuid4()!s}"
     repo.create_git_ref(front_matter + branch_name, default_branch_commit)
     if create_new:
         repo.create_file(
diff --git a/markdown_writer.py b/markdown_writer.py
index be9d904..56a6d12 100644
--- a/markdown_writer.py
+++ b/markdown_writer.py
@@ -94,8 +94,7 @@ def write_step_summary(
         _write_repos_missing_codeowners(file, repos_missing_codeowners, warning_suffix)
         if pull_request_urls:
             file.write("## Pull Requests Created :link:\n")
-            for url in pull_request_urls:
-                file.write(f"- {url}\n")
+            file.write("".join(f"- {url}\n" for url in pull_request_urls))
             file.write("\n")
         if error:
             file.write(f"## Error :x:\n\n{error}\n")
diff --git a/test_cleanowners.py b/test_cleanowners.py
index 2510741..2101811 100644
--- a/test_cleanowners.py
+++ b/test_cleanowners.py
@@ -5,6 +5,8 @@
 from io import StringIO
 from unittest.mock import MagicMock, patch
 
+from github import UnknownObjectException
+
 from cleanowners import (
     build_default_codeowners,
     cleanup_whitespace,
@@ -16,7 +18,6 @@
     print_stats,
     remove_username_from_content,
 )
-from github import UnknownObjectException
 
 
 class TestCommitChanges(unittest.TestCase):