diff --git a/poetry.lock b/poetry.lock
index 903f37a..b4712a1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2248,28 +2248,29 @@ files = [
 
 [[package]]
 name = "ruff"
-version = "0.4.10"
+version = "0.6.4"
 description = "An extremely fast Python linter and code formatter, written in Rust."
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "ruff-0.4.10-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:5c2c4d0859305ac5a16310eec40e4e9a9dec5dcdfbe92697acd99624e8638dac"},
-    {file = "ruff-0.4.10-py3-none-macosx_11_0_arm64.whl", hash = "sha256:a79489607d1495685cdd911a323a35871abfb7a95d4f98fc6f85e799227ac46e"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:b1dd1681dfa90a41b8376a61af05cc4dc5ff32c8f14f5fe20dba9ff5deb80cd6"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:c75c53bb79d71310dc79fb69eb4902fba804a81f374bc86a9b117a8d077a1784"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:18238c80ee3d9100d3535d8eb15a59c4a0753b45cc55f8bf38f38d6a597b9739"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:d8f71885bce242da344989cae08e263de29752f094233f932d4f5cfb4ef36a81"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:330421543bd3222cdfec481e8ff3460e8702ed1e58b494cf9d9e4bf90db52b9d"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:9e9b6fb3a37b772628415b00c4fc892f97954275394ed611056a4b8a2631365e"},
-    {file = "ruff-0.4.10-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:0f54c481b39a762d48f64d97351048e842861c6662d63ec599f67d515cb417f6"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:67fe086b433b965c22de0b4259ddfe6fa541c95bf418499bedb9ad5fb8d1c631"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:acfaaab59543382085f9eb51f8e87bac26bf96b164839955f244d07125a982ef"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_i686.whl", hash = "sha256:3cea07079962b2941244191569cf3a05541477286f5cafea638cd3aa94b56815"},
-    {file = "ruff-0.4.10-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:338a64ef0748f8c3a80d7f05785930f7965d71ca260904a9321d13be24b79695"},
-    {file = "ruff-0.4.10-py3-none-win32.whl", hash = "sha256:ffe3cd2f89cb54561c62e5fa20e8f182c0a444934bf430515a4b422f1ab7b7ca"},
-    {file = "ruff-0.4.10-py3-none-win_amd64.whl", hash = "sha256:67f67cef43c55ffc8cc59e8e0b97e9e60b4837c8f21e8ab5ffd5d66e196e25f7"},
-    {file = "ruff-0.4.10-py3-none-win_arm64.whl", hash = "sha256:dd1fcee327c20addac7916ca4e2653fbbf2e8388d8a6477ce5b4e986b68ae6c0"},
-    {file = "ruff-0.4.10.tar.gz", hash = "sha256:3aa4f2bc388a30d346c56524f7cacca85945ba124945fe489952aadb6b5cd804"},
+    {file = "ruff-0.6.4-py3-none-linux_armv6l.whl", hash = "sha256:c4b153fc152af51855458e79e835fb6b933032921756cec9af7d0ba2aa01a258"},
+    {file = "ruff-0.6.4-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:bedff9e4f004dad5f7f76a9d39c4ca98af526c9b1695068198b3bda8c085ef60"},
+    {file = "ruff-0.6.4-py3-none-macosx_11_0_arm64.whl", hash = "sha256:d02a4127a86de23002e694d7ff19f905c51e338c72d8e09b56bfb60e1681724f"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:7862f42fc1a4aca1ea3ffe8a11f67819d183a5693b228f0bb3a531f5e40336fc"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_armv7l.manylinux2014_armv7l.whl", hash = "sha256:eebe4ff1967c838a1a9618a5a59a3b0a00406f8d7eefee97c70411fefc353617"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:932063a03bac394866683e15710c25b8690ccdca1cf192b9a98260332ca93408"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_ppc64.manylinux2014_ppc64.whl", hash = "sha256:50e30b437cebef547bd5c3edf9ce81343e5dd7c737cb36ccb4fe83573f3d392e"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:c44536df7b93a587de690e124b89bd47306fddd59398a0fb12afd6133c7b3818"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:0ea086601b22dc5e7693a78f3fcfc460cceabfdf3bdc36dc898792aba48fbad6"},
+    {file = "ruff-0.6.4-py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:0b52387d3289ccd227b62102c24714ed75fbba0b16ecc69a923a37e3b5e0aaaa"},
+    {file = "ruff-0.6.4-py3-none-musllinux_1_2_aarch64.whl", hash = "sha256:0308610470fcc82969082fc83c76c0d362f562e2f0cdab0586516f03a4e06ec6"},
+    {file = "ruff-0.6.4-py3-none-musllinux_1_2_armv7l.whl", hash = "sha256:803b96dea21795a6c9d5bfa9e96127cc9c31a1987802ca68f35e5c95aed3fc0d"},
+    {file = "ruff-0.6.4-py3-none-musllinux_1_2_i686.whl", hash = "sha256:66dbfea86b663baab8fcae56c59f190caba9398df1488164e2df53e216248baa"},
+    {file = "ruff-0.6.4-py3-none-musllinux_1_2_x86_64.whl", hash = "sha256:34d5efad480193c046c86608dbba2bccdc1c5fd11950fb271f8086e0c763a5d1"},
+    {file = "ruff-0.6.4-py3-none-win32.whl", hash = "sha256:f0f8968feea5ce3777c0d8365653d5e91c40c31a81d95824ba61d871a11b8523"},
+    {file = "ruff-0.6.4-py3-none-win_amd64.whl", hash = "sha256:549daccee5227282289390b0222d0fbee0275d1db6d514550d65420053021a58"},
+    {file = "ruff-0.6.4-py3-none-win_arm64.whl", hash = "sha256:ac4b75e898ed189b3708c9ab3fc70b79a433219e1e87193b4f2b77251d058d14"},
+    {file = "ruff-0.6.4.tar.gz", hash = "sha256:ac3b5bfbee99973f80aa1b7cbd1c9cbce200883bdd067300c22a6cc1c7fba212"},
 ]
 
 [[package]]
@@ -3057,4 +3058,4 @@ test = ["big-O", "importlib-resources", "jaraco.functools", "jaraco.itertools",
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.9"
-content-hash = "8c852632b6567045f648607e18595ef675d70c28dec7c32be9be3c65eee215e0"
+content-hash = "a03ae622e5e0c2e18de03425f63de7f347fe5193bced217b6754451d2852255a"
diff --git a/pyproject.toml b/pyproject.toml
index 2686329..da11358 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ tzlocal = "^5.2"
 # linting etc
 mypy = "^1.10.0"
 pre-commit = "^3.7.0"
-ruff = "^0.4.2"
+ruff = ">=0.4.2,<0.7.0"
 pymarkdownlnt = "^0.9.17"
 
 # task runner
diff --git a/requirements-dev.txt b/requirements-dev.txt
index b9b89c0..75d9630 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -99,7 +99,7 @@ regex==2024.5.15 ; python_version >= "3.9" and python_version < "4.0"
 requests==2.32.3 ; python_version >= "3.9" and python_version < "4.0"
 rich==13.7.1 ; python_version >= "3.9" and python_version < "4.0"
 rtoml==0.10.0 ; python_version >= "3.9" and python_version < "4.0"
-ruff==0.4.10 ; python_version >= "3.9" and python_version < "4.0"
+ruff==0.6.4 ; python_version >= "3.9" and python_version < "4.0"
 shellingham==1.5.4 ; python_version >= "3.9" and python_version < "4.0"
 simple-toml-settings==0.6.1 ; python_version >= "3.9" and python_version < "4.0"
 six==1.16.0 ; python_version >= "3.9" and python_version < "4.0"