diff --git a/.gitignore b/.gitignore
index 88f80af..4a55e33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,5 +25,3 @@ Icon
 test
 venv
 virtualenv
-/.flake8
-/pyproject.toml
diff --git a/Makefile b/Makefile
index 8b43916..ba9871a 100644
--- a/Makefile
+++ b/Makefile
@@ -10,11 +10,11 @@ help:
 
 ## black - Runs the Black Python formatter against the project
 black:
-	$(VIRTUAL_BIN)/black $(PROJECT_NAME)/ $(TEST_DIR)/ --config examples/style_guides/python/pyproject.toml
+	$(VIRTUAL_BIN)/black $(PROJECT_NAME)/ $(TEST_DIR)/
 
 ## black-check - Checks if the project is formatted correctly against the Black rules
 black-check:
-	$(VIRTUAL_BIN)/black $(PROJECT_NAME)/ $(TEST_DIR)/ --config examples/style_guides/python/pyproject.toml --check
+	$(VIRTUAL_BIN)/black $(PROJECT_NAME)/ $(TEST_DIR)/ --check
 
 ## build - Builds the project in preparation for release
 build:
@@ -35,7 +35,7 @@ docs:
 
 ## flake8 - Lint the project with flake8
 flake8:
-	$(VIRTUAL_BIN)/flake8 $(PROJECT_NAME)/ $(TEST_DIR)/ --append-config examples/style_guides/python/.flake8
+	$(VIRTUAL_BIN)/flake8 $(PROJECT_NAME)/ $(TEST_DIR)/
 
 ## init-examples-submodule - Initialize the examples submodule
 init-examples-submodule:
@@ -54,11 +54,11 @@ update-examples-submodule:
 
 ## isort - Sorts imports throughout the project
 isort:
-	$(VIRTUAL_BIN)/isort $(PROJECT_NAME)/ $(TEST_DIR)/ --settings-file examples/style_guides/python/pyproject.toml
+	$(VIRTUAL_BIN)/isort $(PROJECT_NAME)/ $(TEST_DIR)/
 
 ## isort-check - Checks that imports throughout the project are sorted correctly
 isort-check:
-	$(VIRTUAL_BIN)/isort $(PROJECT_NAME)/ $(TEST_DIR)/ --settings-file examples/style_guides/python/pyproject.toml --check-only
+	$(VIRTUAL_BIN)/isort $(PROJECT_NAME)/ $(TEST_DIR)/ --check-only
 
 ## lint - Run linters on the project
 lint: black-check isort-check flake8 mypy scan
@@ -68,7 +68,7 @@ lint-fix: black isort
 
 ## mypy - Run mypy type checking on the project
 mypy:
-	$(VIRTUAL_BIN)/mypy $(PROJECT_NAME)/ $(TEST_DIR)/ --config-file examples/style_guides/python/pyproject.toml --install-types --non-interactive
+	$(VIRTUAL_BIN)/mypy $(PROJECT_NAME)/ $(TEST_DIR)/ --install-types --non-interactive
 
 ## release - Cuts a release for the project on GitHub (requires GitHub CLI)
 # tag = The associated tag title of the release
diff --git a/easypost/requestor.py b/easypost/requestor.py
index 9f22b9e..5b92ba7 100644
--- a/easypost/requestor.py
+++ b/easypost/requestor.py
@@ -14,6 +14,7 @@
 from urllib.parse import urlencode
 
 import requests
+
 from easypost.constant import (
     API_VERSION,
     COMMUNICATION_ERROR,
diff --git a/easypost/services/referral_customer_service.py b/easypost/services/referral_customer_service.py
index ff74bce..17a3c53 100644
--- a/easypost/services/referral_customer_service.py
+++ b/easypost/services/referral_customer_service.py
@@ -5,6 +5,7 @@
 )
 
 import requests
+
 from easypost.constant import (
     _FILTERS_KEY,
     SEND_STRIPE_DETAILS_ERROR,
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..aa8150b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,71 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "easypost"
+description = "EasyPost Shipping API Client Library for Python"
+version = "10.3.0"
+readme = "README.md"
+requires-python = ">=3.9"
+license = { file = "LICENSE" }
+authors = [{ name = "EasyPost", email = "support@easypost.com" }]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Web Environment",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Intended Audience :: Developers",
+    "Operating System :: OS Independent",
+    "License :: OSI Approved :: MIT License",
+    "Topic :: Software Development :: Libraries",
+]
+dependencies = ["requests >= 2.4.3"]
+optional-dependencies = { dev = [
+    "bandit == 1.8.*",
+    "black == 25.*",
+    "build == 1.2.*",
+    "flake8 == 6.*",
+    "Flake8-pyproject == 1.2.*",
+    "isort == 6.*",
+    "mypy == 1.15.*",
+    "pdoc == 15.*",
+    "pytest-cov == 6.*",
+    "pytest-vcr == 1.*",
+    "pytest == 8.*",
+    "vcrpy == 7.*",
+] }
+
+[project.urls]
+Docs = "https://docs.easypost.com"
+Tracker = "https://github.com/EasyPost/easypost-python/issues"
+Source = "https://github.com/EasyPost/easypost-python"
+
+[tool.setuptools.packages.find]
+exclude = ["docs", "examples", "tests"]
+
+[tool.setuptools.package-data]
+easypost = ["py.typed"]
+
+[tool.black]
+line-length = 120
+
+[tool.isort]
+profile = "black"
+line_length = 120
+indent = 4
+force_grid_wrap = 2
+multi_line_output = 3
+sections = "FUTURE,STDLIB,THIRDPARTY,FIRSTPARTY,LOCALFOLDER"
+lines_after_imports = 2
+include_trailing_comma = true
+use_parentheses = true
+
+[tool.flake8]
+max-line-length = 120
+extend-ignore = ["E203", "F821"]
+per-file-ignores = "__init__.py:F401"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 732e0b2..0000000
--- a/setup.py
+++ /dev/null
@@ -1,72 +0,0 @@
-from setuptools import (
-    find_packages,
-    setup,
-)
-
-
-REQUIREMENTS = [
-    "requests >= 2.4.3",
-]
-
-DEV_REQUIREMENTS = [
-    "bandit==1.8.*",
-    "black==25.*",
-    "build==1.2.*",
-    "flake8==6.*",
-    "isort==6.*",
-    "mypy==1.15.*",
-    "pdoc==15.*",
-    "pytest-cov==6.*",
-    "pytest-vcr==1.*",
-    "pytest==8.*",
-    "vcrpy==7.*",
-]
-
-with open("README.md", encoding="utf-8") as f:
-    long_description = f.read()
-
-setup(
-    name="easypost",
-    version="10.3.0",
-    description="EasyPost Shipping API Client Library for Python",
-    author="EasyPost",
-    author_email="support@easypost.com",
-    url="https://easypost.com/",
-    packages=find_packages(
-        exclude=[
-            "docs",
-            "examples",
-            "tests",
-        ]
-    ),
-    install_requires=REQUIREMENTS,
-    extras_require={
-        "dev": DEV_REQUIREMENTS,
-    },
-    package_data={
-        "easypost": ["py.typed"],
-    },
-    test_suite="test",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    project_urls={
-        "Docs": "https://docs.easypost.com",
-        "Tracker": "https://github.com/EasyPost/easypost-python/issues",
-        "Source": "https://github.com/EasyPost/easypost-python",
-    },
-    python_requires=">=3.9, <4",
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Environment :: Web Environment",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-        "Programming Language :: Python :: 3.11",
-        "Programming Language :: Python :: 3.12",
-        "Programming Language :: Python :: 3.13",
-        "Intended Audience :: Developers",
-        "Operating System :: OS Independent",
-        "License :: OSI Approved :: MIT License",
-        "Topic :: Software Development :: Libraries",
-    ],
-)
diff --git a/tests/conftest.py b/tests/conftest.py
index 1e7d5be..4fb5dac 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -8,6 +8,7 @@
 )
 
 import pytest
+
 from easypost.easypost_client import EasyPostClient
 
 
diff --git a/tests/test_address.py b/tests/test_address.py
index 346a930..ff2a71a 100644
--- a/tests/test_address.py
+++ b/tests/test_address.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_api_key.py b/tests/test_api_key.py
index fa63fc2..07764d6 100644
--- a/tests/test_api_key.py
+++ b/tests/test_api_key.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import ApiKey
 
 
diff --git a/tests/test_base_service.py b/tests/test_base_service.py
index 35770d8..766ba73 100644
--- a/tests/test_base_service.py
+++ b/tests/test_base_service.py
@@ -1,6 +1,7 @@
 from unittest.mock import patch
 
 import pytest
+
 from easypost.constant import NO_MORE_PAGES_ERROR
 from easypost.errors import EndOfPaginationError
 
diff --git a/tests/test_batch.py b/tests/test_batch.py
index c0d38b5..9e7ddee 100644
--- a/tests/test_batch.py
+++ b/tests/test_batch.py
@@ -3,6 +3,7 @@
 import time
 
 import pytest
+
 from easypost.models import Batch
 
 
diff --git a/tests/test_beta_rate.py b/tests/test_beta_rate.py
index 8c228fb..6d1e579 100644
--- a/tests/test_beta_rate.py
+++ b/tests/test_beta_rate.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.util import get_lowest_stateless_rate
 
 
diff --git a/tests/test_beta_referral_customer.py b/tests/test_beta_referral_customer.py
index fbeea44..4860ddf 100644
--- a/tests/test_beta_referral_customer.py
+++ b/tests/test_beta_referral_customer.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.errors.api.api_error import ApiError
 
 
diff --git a/tests/test_billing.py b/tests/test_billing.py
index fa6adcd..320dbb4 100644
--- a/tests/test_billing.py
+++ b/tests/test_billing.py
@@ -1,7 +1,8 @@
 from unittest.mock import patch
 
-import easypost
 import pytest
+
+import easypost
 from easypost.errors import InvalidObjectError
 
 
diff --git a/tests/test_carrier_account.py b/tests/test_carrier_account.py
index 5755439..edf6f97 100644
--- a/tests/test_carrier_account.py
+++ b/tests/test_carrier_account.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.errors.api.api_error import ApiError
 from easypost.models import CarrierAccount
 
diff --git a/tests/test_claim.py b/tests/test_claim.py
index 1cc38f3..7f47490 100644
--- a/tests/test_claim.py
+++ b/tests/test_claim.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_customs_info.py b/tests/test_customs_info.py
index 6a7cf92..34a49ca 100644
--- a/tests/test_customs_info.py
+++ b/tests/test_customs_info.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import CustomsInfo
 
 
diff --git a/tests/test_customs_item.py b/tests/test_customs_item.py
index 15de173..2427394 100644
--- a/tests/test_customs_item.py
+++ b/tests/test_customs_item.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import CustomsItem
 
 
diff --git a/tests/test_easypost_client.py b/tests/test_easypost_client.py
index 5609484..20721d8 100644
--- a/tests/test_easypost_client.py
+++ b/tests/test_easypost_client.py
@@ -3,6 +3,7 @@
 
 import pytest
 import requests
+
 from easypost.easypost_client import EasyPostClient
 from easypost.errors import TimeoutError
 
diff --git a/tests/test_end_shipper.py b/tests/test_end_shipper.py
index cd27936..8602810 100644
--- a/tests/test_end_shipper.py
+++ b/tests/test_end_shipper.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import EndShipper
 
 
diff --git a/tests/test_error.py b/tests/test_error.py
index 99c5ebc..32c7784 100644
--- a/tests/test_error.py
+++ b/tests/test_error.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.errors.api.api_error import ApiError
 
 
diff --git a/tests/test_event.py b/tests/test_event.py
index 5abf7c7..d7f5eeb 100644
--- a/tests/test_event.py
+++ b/tests/test_event.py
@@ -3,6 +3,7 @@
 import time
 
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_insurance.py b/tests/test_insurance.py
index 98ca885..20f4b18 100644
--- a/tests/test_insurance.py
+++ b/tests/test_insurance.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_order.py b/tests/test_order.py
index 4e55617..a500b9c 100644
--- a/tests/test_order.py
+++ b/tests/test_order.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.errors import FilteringError
 from easypost.models import (
     Order,
diff --git a/tests/test_parcel.py b/tests/test_parcel.py
index 0faee13..acfdb85 100644
--- a/tests/test_parcel.py
+++ b/tests/test_parcel.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import Parcel
 
 
diff --git a/tests/test_pickup.py b/tests/test_pickup.py
index f142c4f..9a6d90b 100644
--- a/tests/test_pickup.py
+++ b/tests/test_pickup.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_rate.py b/tests/test_rate.py
index cf48246..993c9bd 100644
--- a/tests/test_rate.py
+++ b/tests/test_rate.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.models import Rate
 
 
diff --git a/tests/test_referral_customer.py b/tests/test_referral_customer.py
index 1930508..da4dbbd 100644
--- a/tests/test_referral_customer.py
+++ b/tests/test_referral_customer.py
@@ -2,6 +2,7 @@
 from unittest.mock import patch
 
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_refund.py b/tests/test_refund.py
index 359758e..16a751c 100644
--- a/tests/test_refund.py
+++ b/tests/test_refund.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_report.py b/tests/test_report.py
index 5aa61bd..cda07a2 100644
--- a/tests/test_report.py
+++ b/tests/test_report.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_scan_form.py b/tests/test_scan_form.py
index 09e7509..2a87d72 100644
--- a/tests/test_scan_form.py
+++ b/tests/test_scan_form.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_shipment.py b/tests/test_shipment.py
index ec98ca6..3d55735 100644
--- a/tests/test_shipment.py
+++ b/tests/test_shipment.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_tracker.py b/tests/test_tracker.py
index afc71c0..2554feb 100644
--- a/tests/test_tracker.py
+++ b/tests/test_tracker.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _FILTERS_KEY,
     _TEST_FAILED_INTENTIONALLY_ERROR,
diff --git a/tests/test_user.py b/tests/test_user.py
index d407764..deab7f4 100644
--- a/tests/test_user.py
+++ b/tests/test_user.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.constant import (
     _TEST_FAILED_INTENTIONALLY_ERROR,
     NO_MORE_PAGES_ERROR,
diff --git a/tests/test_webhook.py b/tests/test_webhook.py
index 021ae77..13c5e64 100644
--- a/tests/test_webhook.py
+++ b/tests/test_webhook.py
@@ -1,4 +1,5 @@
 import pytest
+
 from easypost.errors import SignatureVerificationError
 from easypost.models import Webhook
 from easypost.util import validate_webhook