diff --git a/easypost/easypost_object.py b/easypost/easypost_object.py
index 63b590a..97ec914 100644
--- a/easypost/easypost_object.py
+++ b/easypost/easypost_object.py
@@ -8,7 +8,6 @@
 
 from easypost.constant import NO_ATTRIBUTE_ERROR
 
-
 EASYPOST_OBJECT_ID_PREFIX_TO_CLASS_NAME_MAP: dict[str, Any] = {
     "adr": "Address",
     "ak": "ApiKey",
diff --git a/easypost/requestor.py b/easypost/requestor.py
index 5b92ba7..4f024f2 100644
--- a/easypost/requestor.py
+++ b/easypost/requestor.py
@@ -47,7 +47,6 @@
     UnknownApiError,
 )
 
-
 STATUS_CODE_TO_ERROR_MAPPING: dict[int, Any] = {
     400: BadRequestError,
     401: UnauthorizedError,
diff --git a/pyproject.toml b/pyproject.toml
index 2de473e..ba66b4f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,3 +50,6 @@ easypost = ["py.typed"]
 
 [tool.ruff]
 line-length = 120
+
+[tool.ruff.lint]
+extend-select = ["I"]
diff --git a/tests/conftest.py b/tests/conftest.py
index 4fb5dac..855cdd5 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -11,7 +11,6 @@
 
 from easypost.easypost_client import EasyPostClient
 
-
 EASYPOST_TEST_API_KEY = os.getenv("EASYPOST_TEST_API_KEY")
 EASYPOST_PROD_API_KEY = os.getenv("EASYPOST_PROD_API_KEY")
 PARTNER_USER_PROD_API_KEY = os.getenv("PARTNER_USER_PROD_API_KEY", "123")
diff --git a/tests/test_referral_customer.py b/tests/test_referral_customer.py
index da4dbbd..d39b15f 100644
--- a/tests/test_referral_customer.py
+++ b/tests/test_referral_customer.py
@@ -11,7 +11,6 @@
 from easypost.errors.api.api_error import ApiError
 from easypost.models import User
 
-
 REFERRAL_CUSTOMER_PROD_API_KEY = os.getenv("REFERRAL_CUSTOMER_PROD_API_KEY", "123")