diff --git a/.gitignore b/.gitignore
index 2247d5f..c54af69 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,6 @@
+__pycache__/
+.coverage
 /build
 /dist
+poetry.lock
+
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ebcbe95..f2dadaa 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,7 +1,7 @@
 repos:
 
 - repo: https://github.com/pycqa/isort
-  rev: 5.10.1
+  rev: 5.13.2
   hooks:
   - id: isort
     additional_dependencies: [toml]
@@ -14,7 +14,7 @@ repos:
   hooks:
   - id: mypy
 - repo: https://github.com/pycqa/pylint
-  rev: v2.13.7
+  rev: v2.17.7
   hooks:
   - id: pylint
     additional_dependencies: [toml]
diff --git a/ass_tag_parser/__init__.py b/ass_tag_parser/__init__.py
index a7cfec9..cafd67d 100644
--- a/ass_tag_parser/__init__.py
+++ b/ass_tag_parser/__init__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from .ass_composer import compose_ass
 from .ass_parser import ass_to_plaintext, parse_ass
 from .ass_struct import *
diff --git a/ass_tag_parser/ass_composer.py b/ass_tag_parser/ass_composer.py
index c65589b..3fda978 100644
--- a/ass_tag_parser/ass_composer.py
+++ b/ass_tag_parser/ass_composer.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 
 from ass_tag_parser.ass_struct import (
diff --git a/ass_tag_parser/ass_parser.py b/ass_tag_parser/ass_parser.py
index 3898463..414acbd 100644
--- a/ass_tag_parser/ass_parser.py
+++ b/ass_tag_parser/ass_parser.py
@@ -1,8 +1,22 @@
+from __future__ import annotations
+
 import re
 from dataclasses import dataclass
-from functools import cache
 from typing import Any, Iterable, Optional, Union
 
+try:
+    from functools import cache as _cache  # type: ignore
+
+    def cache(user_function: Any) -> Any:
+        return _cache(user_function)
+
+except ImportError:
+
+    # skip cahcing on Python < 3.9
+    def cache(user_function: Any) -> Any:
+        return user_function
+
+
 from ass_tag_parser.ass_struct import (
     AssItem,
     AssTag,
diff --git a/ass_tag_parser/ass_struct.py b/ass_tag_parser/ass_struct.py
index ba54f5d..a12f376 100644
--- a/ass_tag_parser/ass_struct.py
+++ b/ass_tag_parser/ass_struct.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass, field
 from typing import Optional
 
diff --git a/ass_tag_parser/common.py b/ass_tag_parser/common.py
index ebd68ec..e07eb07 100644
--- a/ass_tag_parser/common.py
+++ b/ass_tag_parser/common.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 from typing import Union
 
diff --git a/ass_tag_parser/draw_composer.py b/ass_tag_parser/draw_composer.py
index 05a16b6..f139ed2 100644
--- a/ass_tag_parser/draw_composer.py
+++ b/ass_tag_parser/draw_composer.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from typing import Any
 
 from ass_tag_parser.common import smart_float
diff --git a/ass_tag_parser/draw_parser.py b/ass_tag_parser/draw_parser.py
index 376d0f0..3a019bb 100644
--- a/ass_tag_parser/draw_parser.py
+++ b/ass_tag_parser/draw_parser.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 from typing import Iterable, Optional, Union, cast
 
@@ -81,12 +83,16 @@ def _parse_draw_commands(ctx: _ParseContext) -> Iterable[AssDrawCmd]:
         elif cmd == "l":
             ret = AssDrawCmdLine(list(_read_points(ctx.io, min_count=1)))
         elif cmd == "b":
-            ret = AssDrawCmdBezier(
-                cast(
-                    tuple[AssDrawPoint, AssDrawPoint, AssDrawPoint],
-                    tuple(_read_points(ctx.io, min_count=3, max_count=3)),
+            points = tuple(_read_points(ctx.io, min_count=3, max_count=3))
+            try:
+                ret = AssDrawCmdBezier(
+                    cast(
+                        tuple[AssDrawPoint, AssDrawPoint, AssDrawPoint], points
+                    )
                 )
-            )
+            except TypeError:
+                # This is a workaround for Python 3.8
+                ret = AssDrawCmdBezier(points)  # type: ignore
         elif cmd == "s":
             ret = AssDrawCmdSpline(
                 list(_read_points(ctx.io, min_count=3, max_count=None))
diff --git a/ass_tag_parser/draw_struct.py b/ass_tag_parser/draw_struct.py
index bfeeaef..6926f04 100644
--- a/ass_tag_parser/draw_struct.py
+++ b/ass_tag_parser/draw_struct.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from dataclasses import dataclass
 from typing import Optional
 
diff --git a/ass_tag_parser/errors.py b/ass_tag_parser/errors.py
index 198ade9..f4ece58 100644
--- a/ass_tag_parser/errors.py
+++ b/ass_tag_parser/errors.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from typing import Optional
 
 
diff --git a/ass_tag_parser/io.py b/ass_tag_parser/io.py
index 1853c47..d7fefda 100644
--- a/ass_tag_parser/io.py
+++ b/ass_tag_parser/io.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import io
 from typing import Optional
 
diff --git a/ass_tag_parser/tests/test_ass_composing.py b/ass_tag_parser/tests/test_ass_composing.py
index 353cb4e..1680caf 100644
--- a/ass_tag_parser/tests/test_ass_composing.py
+++ b/ass_tag_parser/tests/test_ass_composing.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from ass_tag_parser import (
diff --git a/ass_tag_parser/tests/test_draw_composing.py b/ass_tag_parser/tests/test_draw_composing.py
index 61c7b24..77d89e8 100644
--- a/ass_tag_parser/tests/test_draw_composing.py
+++ b/ass_tag_parser/tests/test_draw_composing.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from ass_tag_parser import (
diff --git a/ass_tag_parser/tests/test_draw_parsing.py b/ass_tag_parser/tests/test_draw_parsing.py
index 2533ccc..4b85eb5 100644
--- a/ass_tag_parser/tests/test_draw_parsing.py
+++ b/ass_tag_parser/tests/test_draw_parsing.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import pytest
 
 from ass_tag_parser import (
diff --git a/ass_tag_parser/tests/test_module_exports.py b/ass_tag_parser/tests/test_module_exports.py
index ded65a6..458c86b 100644
--- a/ass_tag_parser/tests/test_module_exports.py
+++ b/ass_tag_parser/tests/test_module_exports.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import re
 from itertools import chain
 from pathlib import Path
diff --git a/poetry.lock b/poetry.lock
deleted file mode 100644
index 8acaa84..0000000
--- a/poetry.lock
+++ /dev/null
@@ -1,445 +0,0 @@
-[[package]]
-name = "atomicwrites"
-version = "1.4.0"
-description = "Atomic file writes."
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-
-[[package]]
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-version = "21.2.0"
-description = "Classes Without Boilerplate"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
-[package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
-docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
-
-[[package]]
-name = "backports.entry-points-selectable"
-version = "1.1.1"
-description = "Compatibility shim providing selectable entry points for older implementations"
-category = "dev"
-optional = false
-python-versions = ">=2.7"
-
-[package.extras]
-docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
-testing = ["pytest", "pytest-flake8", "pytest-cov", "pytest-black (>=0.3.7)", "pytest-mypy", "pytest-checkdocs (>=2.4)", "pytest-enabler (>=1.0.1)"]
-
-[[package]]
-name = "black"
-version = "21.12b0"
-description = "The uncompromising code formatter."
-category = "dev"
-optional = false
-python-versions = ">=3.6.2"
-
-[package.dependencies]
-click = ">=7.1.2"
-mypy-extensions = ">=0.4.3"
-pathspec = ">=0.9.0,<1"
-platformdirs = ">=2"
-tomli = ">=0.2.6,<2.0.0"
-typing-extensions = [
-    {version = ">=3.10.0.0", markers = "python_version < \"3.10\""},
-    {version = "!=3.10.0.1", markers = "python_version >= \"3.10\""},
-]
-
-[package.extras]
-colorama = ["colorama (>=0.4.3)"]
-d = ["aiohttp (>=3.7.4)"]
-jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
-python2 = ["typed-ast (>=1.4.3)"]
-uvloop = ["uvloop (>=0.15.2)"]
-
-[[package]]
-name = "cfgv"
-version = "3.3.1"
-description = "Validate configuration and produce human readable error messages."
-category = "dev"
-optional = false
-python-versions = ">=3.6.1"
-
-[[package]]
-name = "click"
-version = "8.0.3"
-description = "Composable command line interface toolkit"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-colorama = {version = "*", markers = "platform_system == \"Windows\""}
-
-[[package]]
-name = "colorama"
-version = "0.4.4"
-description = "Cross-platform colored terminal text."
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
-[[package]]
-name = "distlib"
-version = "0.3.4"
-description = "Distribution utilities"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "filelock"
-version = "3.4.0"
-description = "A platform independent file lock."
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.extras]
-docs = ["furo (>=2021.8.17b43)", "sphinx (>=4.1)", "sphinx-autodoc-typehints (>=1.12)"]
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-
-[[package]]
-name = "identify"
-version = "2.4.0"
-description = "File identification library for Python"
-category = "dev"
-optional = false
-python-versions = ">=3.6.1"
-
-[package.extras]
-license = ["ukkonen"]
-
-[[package]]
-name = "iniconfig"
-version = "1.1.1"
-description = "iniconfig: brain-dead simple config-ini parsing"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "mypy-extensions"
-version = "0.4.3"
-description = "Experimental type system extensions for programs checked with the mypy typechecker."
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "nodeenv"
-version = "1.6.0"
-description = "Node.js virtual environment builder"
-category = "dev"
-optional = false
-python-versions = "*"
-
-[[package]]
-name = "packaging"
-version = "21.3"
-description = "Core utilities for Python packages"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-pyparsing = ">=2.0.2,<3.0.5 || >3.0.5"
-
-[[package]]
-name = "pathspec"
-version = "0.9.0"
-description = "Utility library for gitignore style pattern matching of file paths."
-category = "dev"
-optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-
-[[package]]
-name = "platformdirs"
-version = "2.4.0"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.extras]
-docs = ["Sphinx (>=4)", "furo (>=2021.7.5b38)", "proselint (>=0.10.2)", "sphinx-autodoc-typehints (>=1.12)"]
-test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock (>=3.6)"]
-
-[[package]]
-name = "pluggy"
-version = "1.0.0"
-description = "plugin and hook calling mechanisms for python"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.extras]
-dev = ["pre-commit", "tox"]
-testing = ["pytest", "pytest-benchmark"]
-
-[[package]]
-name = "pre-commit"
-version = "2.16.0"
-description = "A framework for managing and maintaining multi-language pre-commit hooks."
-category = "dev"
-optional = false
-python-versions = ">=3.6.1"
-
-[package.dependencies]
-cfgv = ">=2.0.0"
-identify = ">=1.0.0"
-nodeenv = ">=0.11.1"
-pyyaml = ">=5.1"
-toml = "*"
-virtualenv = ">=20.0.8"
-
-[[package]]
-name = "py"
-version = "1.11.0"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
-category = "dev"
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-
-[[package]]
-name = "pyparsing"
-version = "3.0.6"
-description = "Python parsing module"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.extras]
-diagrams = ["jinja2", "railroad-diagrams"]
-
-[[package]]
-name = "pytest"
-version = "6.2.5"
-description = "pytest: simple powerful testing with Python"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
-
-[package.dependencies]
-atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
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-colorama = {version = "*", markers = "sys_platform == \"win32\""}
-iniconfig = "*"
-packaging = "*"
-pluggy = ">=0.12,<2.0"
-py = ">=1.8.2"
-toml = "*"
-
-[package.extras]
-testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
-
-[[package]]
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diff --git a/pyproject.toml b/pyproject.toml
index 8e2c215..b0b2958 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,12 +23,13 @@ packages = [
 include = ["ass_tag_parser/py.typed"]
 
 [tool.poetry.dependencies]
-python = ">=3.9"
+python = ">=3.8"
 
 [tool.poetry.dev-dependencies]
 pre-commit = "^2.16.0"
-black = "^21.12b0"
+black = ">=21.12b0"
 pytest = "^6.2.5"
+isort = ">=5.10.1, <5.14"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
@@ -45,6 +46,7 @@ include_trailing_comma = true
 [tool.mypy]
 strict = true
 disallow_untyped_decorators = false
+python_version = "3.8"
 
 [tool.pylint.master]
 jobs = 0
@@ -52,7 +54,7 @@ jobs = 0
 [tool.pylint.message_control]
 disable = [
     "import-error",
-    "no-self-use",
+    "no-self-use", # pylint: disable=useless-option-value
     "missing-docstring",
     "too-few-public-methods",
     "duplicate-code",