diff --git a/dojo/tools/codechecker/parser.py b/dojo/tools/codechecker/parser.py
index 0d9aa02436e..16eff099c76 100644
--- a/dojo/tools/codechecker/parser.py
+++ b/dojo/tools/codechecker/parser.py
@@ -128,4 +128,4 @@ def get_mapped_severity(severity):
         "STYLE": "Info",
         "UNSPECIFIED": "Info",
     }
-    return switcher.get(severity.upper(), None)
+    return switcher.get(severity.upper())
diff --git a/dojo/tools/ms_defender/parser.py b/dojo/tools/ms_defender/parser.py
index 17ca740973d..4dac598b770 100644
--- a/dojo/tools/ms_defender/parser.py
+++ b/dojo/tools/ms_defender/parser.py
@@ -95,7 +95,7 @@ def get_findings(self, file, test):
                     continue
             for vulnerability in vulnerabilities:
                 try:
-                    machine = machines.get(vulnerability["machineId"], None)
+                    machine = machines.get(vulnerability["machineId"])
                     if machine is not None:
                         findings.append(self.process_json_with_machine_info(vulnerability, machine))
                     else:
diff --git a/dojo/tools/threagile/parser.py b/dojo/tools/threagile/parser.py
index 0a8908ec5a6..de890185514 100644
--- a/dojo/tools/threagile/parser.py
+++ b/dojo/tools/threagile/parser.py
@@ -86,7 +86,7 @@ def get_items(self, tree, test):
             severity = severity if severity != "Elevated" else "High"
             finding = Finding(
                 title=item.get("category"),
-                cwe=RISK_TO_CWE_MAP.get(item.get("category"), None),
+                cwe=RISK_TO_CWE_MAP.get(item.get("category")),
                 description=item.get("title"),
                 impact=item.get("exploitation_impact"),
                 severity=severity,
diff --git a/requirements-lint.txt b/requirements-lint.txt
index 3766da038dc..454ebe7e8e0 100644
--- a/requirements-lint.txt
+++ b/requirements-lint.txt
@@ -1 +1 @@
-ruff==0.13.0
\ No newline at end of file
+ruff==0.13.1
\ No newline at end of file