diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e58e2b61..37a8eee2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,4 +1,4 @@
-# This file was automatically copied from notifications-utils@92.1.1
+# This file was automatically copied from notifications-utils@94.0.1
 
 repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
@@ -9,12 +9,8 @@ repos:
   - id: check-yaml
   - id: debug-statements
 - repo: https://github.com/charliermarsh/ruff-pre-commit
-  rev: 'v0.8.2'
+  rev: 'v0.9.2'
   hooks:
     - id: ruff
       args: [--fix, --exit-non-zero-on-fix]
-- repo: https://github.com/psf/black
-  rev: 24.10.0
-  hooks:
-    - id: black
-      name: black (python)
+    - id: ruff-format
diff --git a/Makefile b/Makefile
index 439c0cc9..9a60bd90 100644
--- a/Makefile
+++ b/Makefile
@@ -55,8 +55,7 @@ run-celery-with-docker: ## Run celery in Docker container
 .PHONY: test
 test: ## Run tests (used by Concourse)
 	ruff check .
-	black --check .
-
+	ruff format --check .
 	pytest -n auto --maxfail=10
 
 .PHONY: test-with-docker
diff --git a/app/__init__.py b/app/__init__.py
index b6ebf390..2708ac6e 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -7,11 +7,11 @@
 from flask import Flask, jsonify
 from flask_httpauth import HTTPTokenAuth
 from gds_metrics import GDSMetrics
-from notifications_utils import logging as utils_logging
 from notifications_utils import request_helper
 from notifications_utils.celery import NotifyCelery
 from notifications_utils.clients.signing.signing_client import Signing
 from notifications_utils.clients.statsd.statsd_client import StatsdClient
+from notifications_utils.logging import flask as utils_logging
 from notifications_utils.s3 import S3ObjectNotFound, s3download, s3upload
 
 from app import weasyprint_hack
diff --git a/app/celery/tasks.py b/app/celery/tasks.py
index 85b70754..8a311238 100644
--- a/app/celery/tasks.py
+++ b/app/celery/tasks.py
@@ -115,7 +115,7 @@ def copy_s3_object(source_bucket, source_filename, target_bucket, target_filenam
 def _create_pdf_for_letter(
     task: Task, letter_details, language: Literal["english", "welsh"], include_notify_tag: bool = True
 ):
-    logo_filename = f'{letter_details["logo_filename"]}.svg' if letter_details["logo_filename"] else None
+    logo_filename = f"{letter_details['logo_filename']}.svg" if letter_details["logo_filename"] else None
     template = LetterPrintTemplate(
         letter_details["template"],
         values=letter_details["values"] or None,
diff --git a/app/embedded_fonts.py b/app/embedded_fonts.py
index 4ca59ad7..4a24a4e9 100644
--- a/app/embedded_fonts.py
+++ b/app/embedded_fonts.py
@@ -110,6 +110,6 @@ def embed_fonts(pdf_data):
         raise Exception(
             f"ghostscript font embed process failed with return code: {gs_process.returncode}\n"
             f"stderr:\n"
-            f'{stderr.decode("utf-8")}'
+            f"{stderr.decode('utf-8')}"
         )
     return BytesIO(stdout)
diff --git a/app/preview.py b/app/preview.py
index 0d7f76ac..fe31132d 100644
--- a/app/preview.py
+++ b/app/preview.py
@@ -200,7 +200,7 @@ def _get_pdf_from_letter_json(letter_json, language="english") -> BytesIO:
 
 
 def get_html(json, language="english"):
-    branding_filename = f'{json["filename"]}.svg' if json["filename"] else None
+    branding_filename = f"{json['filename']}.svg" if json["filename"] else None
 
     return str(
         LetterPreviewTemplate(
diff --git a/requirements.in b/requirements.in
index 23a5a170..757dfd32 100644
--- a/requirements.in
+++ b/requirements.in
@@ -17,7 +17,7 @@ PyMuPDF==1.24.4
 WeasyPrint==59
 
 # Run `make bump-utils` to update to the latest version
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@92.1.1
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@94.0.1
 
 # gds-metrics requires prometheseus 0.2.0, override that requirement as 0.7.1 brings significant performance gains
 prometheus-client==0.14.1
diff --git a/requirements.txt b/requirements.txt
index 1a1910a7..8e4d71ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -110,7 +110,7 @@ markupsafe==2.1.5
     #   werkzeug
 mistune==0.8.4
     # via notifications-utils
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@b9ef1b45b655324d6341995afffc3ebc25a3ed72
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@d6311c3ab83b8225265277f781157c48f9318ae9
     # via -r requirements.in
 ordered-set==4.1.0
     # via notifications-utils
diff --git a/requirements_for_test.txt b/requirements_for_test.txt
index 0337e25d..a6ae617f 100644
--- a/requirements_for_test.txt
+++ b/requirements_for_test.txt
@@ -18,8 +18,6 @@ billiard==4.2.0
     # via
     #   -r requirements.txt
     #   celery
-black==24.10.0
-    # via -r requirements_for_test_common.in
 blinker==1.9.0
     # via
     #   -r requirements.txt
@@ -63,7 +61,6 @@ charset-normalizer==3.3.2
 click==8.1.7
     # via
     #   -r requirements.txt
-    #   black
     #   celery
     #   click-didyoumean
     #   click-plugins
@@ -178,9 +175,7 @@ mistune==0.8.4
     #   notifications-utils
 moto==4.1.5
     # via -r requirements_for_test.in
-mypy-extensions==1.0.0
-    # via black
-notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@b9ef1b45b655324d6341995afffc3ebc25a3ed72
+notifications-utils @ git+https://github.com/alphagov/notifications-utils.git@d6311c3ab83b8225265277f781157c48f9318ae9
     # via -r requirements.txt
 ordered-set==4.1.0
     # via
@@ -189,11 +184,8 @@ ordered-set==4.1.0
 packaging==24.1
     # via
     #   -r requirements.txt
-    #   black
     #   gunicorn
     #   pytest
-pathspec==0.12.1
-    # via black
 pdf2image==1.12.1
     # via -r requirements.txt
 phonenumbers==8.13.51
@@ -206,8 +198,6 @@ pillow==9.3.0
     #   pdf2image
     #   reportlab
     #   weasyprint
-platformdirs==4.3.6
-    # via black
 pluggy==1.5.0
     # via pytest
 prometheus-client==0.14.1
@@ -300,7 +290,7 @@ requests-mock==1.12.1
     # via -r requirements_for_test_common.in
 responses==0.25.3
     # via moto
-ruff==0.8.2
+ruff==0.9.2
     # via -r requirements_for_test_common.in
 s3transfer==0.10.1
     # via
diff --git a/requirements_for_test_common.in b/requirements_for_test_common.in
index d424c600..e660e7e4 100644
--- a/requirements_for_test_common.in
+++ b/requirements_for_test_common.in
@@ -1,4 +1,4 @@
-# This file was automatically copied from notifications-utils@92.1.1
+# This file was automatically copied from notifications-utils@94.0.1
 
 beautifulsoup4==4.12.3
 pytest==8.3.4
@@ -9,5 +9,4 @@ pytest-testmon==2.1.1
 requests-mock==1.12.1
 freezegun==1.5.1
 
-black==24.10.0  # Also update `.pre-commit-config.yaml` if this changes
-ruff==0.8.2  # Also update `.pre-commit-config.yaml` if this changes
+ruff==0.9.2  # Also update `.pre-commit-config.yaml` if this changes
diff --git a/pyproject.toml b/ruff.toml
similarity index 81%
rename from pyproject.toml
rename to ruff.toml
index a98c29c9..77c6085c 100644
--- a/pyproject.toml
+++ b/ruff.toml
@@ -1,14 +1,22 @@
-# This file was automatically copied from notifications-utils@92.1.1
+# This file was automatically copied from notifications-utils@94.0.1
 
-[tool.black]
-line-length = 120
+exclude = [
+    "migrations/versions/",
+    "venv*",
+    "__pycache__",
+    "node_modules",
+    "cache",
+    "migrations",
+    "build",
+    "sample_cap_xml_documents.py",
+]
 
-[tool.ruff]
 line-length = 120
 
 target-version = "py311"
 
-lint.select = [
+[lint]
+select = [
     "E",  # pycodestyle
     "W",  # pycodestyle
     "F",  # pyflakes
@@ -24,14 +32,4 @@ lint.select = [
     "PIE",  # flake8-pie
     "N804",  # First argument of a class method should be named `cls`
 ]
-lint.ignore = []
-exclude = [
-    "migrations/versions/",
-    "venv*",
-    "__pycache__",
-    "node_modules",
-    "cache",
-    "migrations",
-    "build",
-    "sample_cap_xml_documents.py",
-]
+ignore = []