diff --git a/.flake8 b/.flake8
deleted file mode 100644
index 50dd9ac..0000000
--- a/.flake8
+++ /dev/null
@@ -1,5 +0,0 @@
-[flake8]
-ignore = E203, W503, E501
-exclude = venv*,__pycache__,dist,.git
-max-line-length = 88
-max-complexity = 12
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 8564a63..133af27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,4 +5,6 @@
 __pycache__
 *.egg-info
 dist
-venv
\ No newline at end of file
+venv
+.ruff_cache
+.pytest_cache
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 013eac7..a2d3f65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,21 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](https://github.com/nationalarchives/python-utilities/compare/v1.4.0...HEAD)
+## [Unreleased](https://github.com/nationalarchives/python-utilities/compare/v1.5.0...HEAD)
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+## [1.5.0](https://github.com/nationalarchives/python-utilities/compare/v1.4.0...v1.5.0) - 2026-05-14
 
 ### Added
 
@@ -22,8 +36,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `SimpleJsonApiClient` raises `ApiError` exceptions rather than generic `Exception`
 - Renamed the `bytes` parameter of `pretty_file_size()` to `filesize_bytes`
 
-### Deprecated
-
 ### Removed
 
 - Removed `security_headers` parameter in `Talisman`
@@ -33,8 +45,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed logic inversion for `default_headers` in `SimpleJsonApiClient`
 - Incorrect `ValueError` exceptions changed to `TypeError`
 
-### Security
-
 ## [1.4.0](https://github.com/nationalarchives/python-utilities/compare/v1.3.0...v1.4.0) - 2026-04-14
 
 ### Added
diff --git a/poetry.lock b/poetry.lock
index 2219a09..4024be1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -220,14 +220,14 @@ dotenv = ["python-dotenv"]
 
 [[package]]
 name = "idna"
-version = "3.14"
+version = "3.15"
 description = "Internationalized Domain Names in Applications (IDNA)"
 optional = false
 python-versions = ">=3.8"
 groups = ["main", "test"]
 files = [
-    {file = "idna-3.14-py3-none-any.whl", hash = "sha256:e677eaf072e290f7b725f9acf0b3a2bd55f9fd6f7c70abe5f0e34823d0accf69"},
-    {file = "idna-3.14.tar.gz", hash = "sha256:466d810d7a2cc1022bea9b037c39728d51ae7dad40d480fc9b7d7ecf98ba8ee3"},
+    {file = "idna-3.15-py3-none-any.whl", hash = "sha256:048adeaf8c2d788c40fee287673ccaa74c24ffd8dcf09ffa555a2fbb59f10ac8"},
+    {file = "idna-3.15.tar.gz", hash = "sha256:ca962446ea538f7092a95e057da437618e886f4d349216d2b1e294abfdb65fdc"},
 ]
 
 [package.extras]
@@ -367,14 +367,14 @@ markers = {main = "extra == \"flask\""}
 
 [[package]]
 name = "requests"
-version = "2.34.0"
+version = "2.34.1"
 description = "Python HTTP for Humans."
 optional = false
 python-versions = ">=3.10"
 groups = ["main", "test"]
 files = [
-    {file = "requests-2.34.0-py3-none-any.whl", hash = "sha256:917520a21b767485ce7c588f4ebb917c436b24a31231b44228715eaeb5a52c60"},
-    {file = "requests-2.34.0.tar.gz", hash = "sha256:7d62fe92f50eb82c529b0916bb445afa1531a566fc8f35ffdc64446e771b856a"},
+    {file = "requests-2.34.1-py3-none-any.whl", hash = "sha256:bf38a3ff993960d3dd819c08862c40b3c703306eb7c744fcd9f4ddbb95b548f0"},
+    {file = "requests-2.34.1.tar.gz", hash = "sha256:0fc5669f2b69704449fe1552360bd2a73a54512dfd03e65529157f1513322beb"},
 ]
 
 [package.dependencies]
diff --git a/pyproject.toml b/pyproject.toml
index bff3108..59baa0d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "tna-utilities"
-version = "1.4.0"
+version = "1.5.0"
 requires-python = ">=3.10"
 authors = [
   {name = "Andrew Hosgood", email = "andrew.hosgood@nationalarchives.gov.uk"},