diff --git a/check_versions.py b/check_versions.py
index 449954b..dad96b2 100644
--- a/check_versions.py
+++ b/check_versions.py
@@ -1,4 +1,3 @@
-import re
 #!/usr/bin/env python3
 """
 k8s-version-tracker: Weekly Kubernetes image version checker and Mattermost notifier.
@@ -9,6 +8,8 @@ notification with the weekly report.
 """
 
 import os
+import re
+import json
 import logging
 import subprocess
 from dataclasses import dataclass, field
@@ -16,7 +17,7 @@ from typing import Optional
 from datetime import datetime, timezone
 
 import requests
-from kubernetes import config
+from kubernetes import client, config
 from packaging.version import Version, InvalidVersion
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
@@ -120,6 +121,7 @@ def parse_image_ref(image: str) -> ImageInfo:
 def _semver_tags(tags: list[str], current_tag: str) -> Optional[str]:
     """From a list of tags, return the latest stable semver tag comparable to current."""
     norm = current_tag.lstrip("v")
+    has_v_prefix = current_tag.startswith("v")
 
     # Detect suffix pattern (e.g. '-alpine', '-amd64')
     suffix_match = re.search(r"(-[a-zA-Z][a-zA-Z0-9._-]*)$", norm)
diff --git a/request_upgrades.py b/request_upgrades.py
index 77f8e47..3984685 100644
--- a/request_upgrades.py
+++ b/request_upgrades.py
@@ -8,7 +8,7 @@ the tag updates. ArgoCD auto-syncs from there — no direct kubectl patching.
 """
 
 import os
-import re
+
 import shutil
 import subprocess
 import tempfile
@@ -18,7 +18,7 @@ from datetime import datetime, timezone
 from pathlib import Path
 
 import requests
-from kubernetes import client, config
+from kubernetes import config
 from packaging.version import Version, InvalidVersion
 
 from check_versions import (
diff --git a/web.py b/web.py
index 39e6548..cb5213a 100644
--- a/web.py
+++ b/web.py
@@ -12,7 +12,7 @@ Routes:
 """
 
 import logging
-import os
+
 from concurrent.futures import ThreadPoolExecutor, as_completed
 from datetime import datetime, timezone