diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e9129f0..b19c635 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,44 +1,49 @@
 repos:
-  - repo: https://github.com/FHPythonUtils/Blackt
-    rev: '2022.0.3'
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.1.14
     hooks:
-      - id: blackt
+      - id: ruff
+        args: [ --fix ]
+
+  - repo: https://github.com/RobertCraigie/pyright-python
+    rev: v1.1.347
+    hooks:
+    - id: pyright
 
-  - repo: https://github.com/pycqa/isort
-    rev: 5.12.0
+  - repo: https://github.com/FHPythonUtils/Blackt
+    rev: '2024.0.1'
     hooks:
-      - id: isort
+      - id: blackt
 
-  - repo: https://github.com/pycqa/pylint
-    rev: v3.0.0a6
+  - repo: https://github.com/Lucas-C/pre-commit-hooks-safety
+    rev: v1.3.2
     hooks:
-      - id: pylint
-        exclude: "tests/"
-        args: [--disable=import-error,--jobs=0]
+    -   id: python-safety-dependencies-check
+        files: pyproject.toml
 
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.4.0
+    rev: v4.5.0
     hooks:
       - id: trailing-whitespace
-        exclude: "tests/"
       - id: end-of-file-fixer
-        exclude: "tests/"
+      - id: check-case-conflict
+      - id: check-executables-have-shebangs
+      - id: check-json
+      - id: check-merge-conflict
+      - id: check-shebang-scripts-are-executable
+      - id: check-symlinks
+      - id: check-toml
+      - id: check-vcs-permalinks
+      - id: check-yaml
+      - id: detect-private-key
+      - id: mixed-line-ending
 
-  - repo: https://github.com/asottile/pyupgrade
-    rev: v3.7.0
-    hooks:
-      - id: pyupgrade
-        args: [--py38-plus]
   - repo: https://github.com/boidolr/pre-commit-images
-    rev: v1.2.1
+    rev: v1.5.1
     hooks:
-      - id: optimize-avif
-        exclude: "tests/"
       - id: optimize-jpg
-        exclude: "tests/"
       - id: optimize-png
-        exclude: "tests/"
       - id: optimize-svg
-        exclude: "tests/"
       - id: optimize-webp
-        exclude: "tests/"
+
+exclude: "tests/data|documentation/reference"
diff --git a/getostheme/__init__.py b/getostheme/__init__.py
index 7626a59..0f5b95b 100644
--- a/getostheme/__init__.py
+++ b/getostheme/__init__.py
@@ -1,4 +1,4 @@
-"""Use this module to get the OS theme (dark/light)
+"""Use this module to get the OS theme (dark/light).
 """
 # pylint: disable=import-outside-toplevel
 from __future__ import annotations
@@ -9,12 +9,14 @@
 
 def isLightMode_Mac() -> bool:  # pylint: disable=invalid-name
 	"""For MacOS BSD-3-Clause albertosottile
-	(https://github.com/albertosottile/darkdetect)
+	(https://github.com/albertosottile/darkdetect).
 
-	Raises:
+	Raises
+	------
 		OSError: Cannot load objc
 
-	Returns:
+	Returns
+	-------
 		bool: Windows is in light mode
 	"""
 	import ctypes
@@ -22,7 +24,8 @@ def isLightMode_Mac() -> bool:  # pylint: disable=invalid-name
 
 	lib = ctypes.util.find_library("objc")
 	if not lib:
-		raise OSError("Cannot load objc")
+		msg = "Cannot load objc"
+		raise OSError(msg)
 	objc = ctypes.cdll.LoadLibrary(lib)
 
 	void_p = ctypes.c_void_p
@@ -35,16 +38,18 @@ def isLightMode_Mac() -> bool:  # pylint: disable=invalid-name
 	# Objective C msg send
 	msgSend = objc.objc_msgSend
 
-	def _encodeUTF8(string: str | bytes):
-		"""Encode string as utf8 bytes
+	def _encodeUTF8(string: str | bytes) -> bytes:
+		"""Encode string as utf8 bytes.
 
 		Args:
+		----
 			string (Union[str, bytes]): string to encode
 
 		Returns:
+		-------
 			bytes: bytes
 		"""
-		if not isinstance(string, bytes):
+		if isinstance(string, str):
 			string = string.encode("utf8")
 		return string
 
@@ -55,9 +60,10 @@ def objcClass(classname: str | bytes):
 		return objc.objc_getClass(_encodeUTF8(classname))
 
 	def theme() -> str:
-		"""Get the MAC OS theme string
+		"""Get the MAC OS theme string.
 
-		Returns:
+		Returns
+		-------
 			string: Theme string
 		"""
 		nsAutoreleasePool = objc.objc_getClass("NSAutoreleasePool")
@@ -75,10 +81,7 @@ def theme() -> str:
 		appearanceNS = msgSend(stdUserDef, objcName("stringForKey:"), void_p(key))
 		appearanceC = msgSend(appearanceNS, objcName("UTF8String"))
 
-		if appearanceC is not None:
-			out = ctypes.string_at(appearanceC)
-		else:
-			out = None
+		out = ctypes.string_at(appearanceC) if appearanceC is not None else None
 
 		msgSend(pool, objcName("release"))
 
@@ -91,9 +94,10 @@ def theme() -> str:
 
 def isLightMode_Windows() -> bool:  # pylint: disable=invalid-name
 	"""For Windows OS MIT clxmente
-	(https://github.com/clxmente/Windows-Dark-Mode-Check)
+	(https://github.com/clxmente/Windows-Dark-Mode-Check).
 
-	Returns:
+	Returns
+	-------
 		bool: Windows is in light mode
 	"""
 	from winreg import HKEY_CURRENT_USER, ConnectRegistry, OpenKey, QueryValueEx
@@ -105,9 +109,10 @@ def isLightMode_Windows() -> bool:  # pylint: disable=invalid-name
 
 
 def isLightMode_Linux() -> bool:  # pylint: disable=invalid-name
-	"""For Linux OS MIT FredHappyface
+	"""For Linux OS MIT FredHappyface.
 
-	Returns:
+	Returns
+	-------
 		bool: Linux is in light mode
 	"""
 	if importlib.util.find_spec("PyQt5"):  # Qt5
@@ -128,9 +133,10 @@ def isLightMode_Linux() -> bool:  # pylint: disable=invalid-name
 
 
 def isLightMode() -> bool:
-	"""Call isLightMode_OS
+	"""Call isLightMode_OS.
 
-	Returns:
+	Returns
+	-------
 		bool: OS is in light mode
 	"""
 	if platform.system() == "Darwin":
@@ -143,13 +149,15 @@ def isLightMode() -> bool:
 
 
 def isDarkMode() -> bool:
-	"""
-	Returns:
+	"""Is the OS in dark mode?.
+
+	Returns
+	-------
 		bool: OS is in dark mode
 	"""
 	return not isLightMode()
 
 
-def cli():
-	"""CLI entry point"""
+def cli() -> None:
+	"""CLI entry point."""
 	print("OS is in " + ("Light" if isLightMode() else "Dark") + " Mode")
diff --git a/getostheme/__main__.py b/getostheme/__main__.py
index 33d6567..831ff8e 100644
--- a/getostheme/__main__.py
+++ b/getostheme/__main__.py
@@ -1,4 +1,4 @@
-""" entry point for python -m getostheme """
+""" entry point for python -m getostheme. """
 from __future__ import annotations
 
 from . import cli
diff --git a/pyproject.toml b/pyproject.toml
index ed49696..16e5236 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,38 +24,46 @@ readme = "README.md"
 getostheme = 'getostheme:cli'
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.8"
 PyQt5 = { version = "<6,>=5.15.10", optional = true }
 
-[tool.black]
-line-length = 100
-target-version = ["py38"]
-
-[tool.isort]
-profile = "black"
-indent = "Tab"
-
-[tool.pydocstyle]
-convention = "google"
-ignore = "D205,D415"
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.4"
+handsdown = "^2.1.0"
+coverage = "^7.4.0"
+ruff = "^0.1.13"
+blackt = "^2024.0.1"
+pyright = "^1.1.347"
 
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
-[tool.pylint.basic]
-argument-naming-style = "camelCase"
-attr-naming-style = "camelCase"
-function-naming-style = "camelCase"
-method-naming-style = "camelCase"
-variable-naming-style = "camelCase"
+[tool.ruff]
+line-length = 100
+indent-width = 4
+target-version = "py38"
 
-[tool.pylint.format]
-indent-string = "\t"
+[tool.ruff.lint]
+select = ["ALL"]
+ignore = [
+    "ANN101",  # type annotation for self in method
+    "COM812",  # enforce trailing comma
+	"D2",  # pydocstyle formatting
+    "N802", "N803", "N806", "N812", "N813",  # pep8 naming
+    "PLR09",  # pylint refactor too many
+    "TCH",  # type check blocks
+    "W191"  # ignore this to allow tabs
+]
+fixable = ["ALL"]
+
+[tool.ruff.lint.per-file-ignores]
+"**/{tests,docs,tools}/*" = ["D", "S101", "E402"]
 
-[tool.pylint.master]
-ignore-paths = ["tests"]
+[tool.black]
+line-length = 100
+target-version = ["py38"]
 
-[tool.pylint.messages_control]
-enable = ["F", "E", "W", "R", "C"]
-disable = ["pointless-string-statement", "superfluous-parens"]
+[tool.pyright]
+venvPath = "."
+venv = ".venv"
diff --git a/requirements.txt b/requirements.txt
index 8b13789..e69de29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +0,0 @@
-