diff --git a/setup.cfg b/setup.cfg
index 89acffda..37cc7a8e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,3 @@
-[bdist_wheel]
-universal = 1
-
 [flake8]
 # Recommend matching the black line length (default 88),
 # rather than using the flake8 default of 79:
diff --git a/setup.py b/setup.py
index 4229c0da..4f86bea2 100644
--- a/setup.py
+++ b/setup.py
@@ -27,17 +27,19 @@ def read_file(filename):
 setup(
     author="Xero Developer API",
     author_email="api@xero.com",
-    python_requires=">=3.5",
+    python_requires=">=3.8",
     classifiers=[
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Natural Language :: English",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "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",
     ],
     description="Official Python sdk for Xero API generated by OpenAPI spec for oAuth2",
     install_requires=load_requirements("requirements.txt"),
diff --git a/tox.ini b/tox.ini
index 4f2d367c..b4d4e261 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,5 @@
 [tox]
-envlist = py35, py36, py37, py38, flake8
-
-;[travis]
-;python =
-;    3.8: py38
-;    3.7: py37
-;    3.6: py36
-;    3.5: py35
+envlist = py38, py39, py310, py311, py312, py313, flake8
 
 [testenv:flake8]
 basepython = python