diff --git a/CHANGELOG.md b/CHANGELOG.md
index 860731e5..08720bb8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,7 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Dependencies: Update pydantic from 2.9.2 to 2.10.4 ([@dirksammel](https://github.com/dirksammel))
 - Dependencies: Update pyo3 from 0.20.3 to 0.22.5 ([@dirksammel](https://github.com/dirksammel))
 - Dependencies: Update pytest from 8.3.3 to 8.3.4 ([@dirksammel](https://github.com/dirksammel))
-- Dependencies: Update ruff from 0.7.1 to 0.8.6 ([@dirksammel](https://github.com/dirksammel))
+- Dependencies: Update ruff from 0.7.1 to 0.9.0 ([@dirksammel](https://github.com/dirksammel))
 - Dependencies: Update setuptools from 75.3.0 to 75.8.0 ([@dirksammel](https://github.com/dirksammel))
 - Dependencies: Update sqlx from 0.7.4 to 0.8.2 (missed some occurrences) ([@dirksammel](https://github.com/dirksammel))
 - Dependencies: Update types-pyyaml from 6.0.12.20240917 to 6.0.12.20241230 ([@dirksammel](https://github.com/dirksammel))
diff --git a/collectors/slurm/src/auditorsender.rs b/collectors/slurm/src/auditorsender.rs
index e22aea94..9bfc13fc 100644
--- a/collectors/slurm/src/auditorsender.rs
+++ b/collectors/slurm/src/auditorsender.rs
@@ -22,7 +22,7 @@ pub(crate) struct AuditorSender {
     hold_till_shutdown: Option<mpsc::Sender<()>>,
 }
 
-impl<'a> AuditorSender {
+impl AuditorSender {
     #[tracing::instrument(
         name = "Starting AuditorSender",
         skip(database, rx, shutdown_notifier, shutdown, channel, client)
diff --git a/plugins/apel/pyproject.toml b/plugins/apel/pyproject.toml
index 1c939022..b2b6d84e 100644
--- a/plugins/apel/pyproject.toml
+++ b/plugins/apel/pyproject.toml
@@ -19,7 +19,7 @@ readme = "README.md"
 [project.optional-dependencies]
 style = [
       "black==24.10.0",
-      "ruff==0.8.6",
+      "ruff==0.9.0",
 ]
 tests = [
       "pytest==8.3.4",
diff --git a/pyauditor/scripts/test_advanced_query.py b/pyauditor/scripts/test_advanced_query.py
index 421f5538..008cf11d 100644
--- a/pyauditor/scripts/test_advanced_query.py
+++ b/pyauditor/scripts/test_advanced_query.py
@@ -208,7 +208,7 @@ async def main():
     assert len(records) == 34
 
     for i in range(0, 10):
-        assert records[i].record_id == f"record2-{9-i:02d}"
+        assert records[i].record_id == f"record2-{9 - i:02d}"
 
     query_string = QueryBuilder().limit(4).build()
 
diff --git a/pyauditor/scripts/test_advanced_query_blocking.py b/pyauditor/scripts/test_advanced_query_blocking.py
index e1e16088..fa02e25b 100644
--- a/pyauditor/scripts/test_advanced_query_blocking.py
+++ b/pyauditor/scripts/test_advanced_query_blocking.py
@@ -212,7 +212,7 @@ def main():
     assert len(records) == 34
 
     for i in range(0, 10):
-        assert records[i].record_id == f"record2-{9-i:02d}"
+        assert records[i].record_id == f"record2-{9 - i:02d}"
 
     query_string = QueryBuilder().limit(4).build()
 
diff --git a/pyauditor/scripts/test_advanced_query_queued.py b/pyauditor/scripts/test_advanced_query_queued.py
index 2b577a0c..ca87e161 100644
--- a/pyauditor/scripts/test_advanced_query_queued.py
+++ b/pyauditor/scripts/test_advanced_query_queued.py
@@ -216,7 +216,7 @@ async def main():
     assert len(records) == 34
 
     for i in range(0, 10):
-        assert records[i].record_id == f"record2-{9-i:02d}"
+        assert records[i].record_id == f"record2-{9 - i:02d}"
 
     query_string = QueryBuilder().limit(4).build()