diff --git a/.github/workflows/testing.yaml b/.github/workflows/testing.yaml
index 25adc78..7e0c38d 100644
--- a/.github/workflows/testing.yaml
+++ b/.github/workflows/testing.yaml
@@ -15,7 +15,7 @@ jobs:
     timeout-minutes: 3
     strategy:
       matrix:
-        python: ["3.7", "3.8", "3.9", "3.10"]
+        python: ["3.9", "3.10"]
     container:
       image: python:${{ matrix.python }}-alpine
     steps:
diff --git a/LICENSE b/LICENSE
index 0f39f88..adc3c76 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2015-2020 AWeber Communications
+Copyright (c) 2015-2025 AWeber Communications
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
diff --git a/docs/history.rst b/docs/history.rst
index 06c1408..c8eec3b 100644
--- a/docs/history.rst
+++ b/docs/history.rst
@@ -3,6 +3,12 @@
 Release History
 ===============
 
+`Next Release`_
+---------------
+- Add explicit dependency on setuptools package since we use it at runtime
+- Remove support for Python < 3.9. The library will continue to work but we
+  are no longer testing older versions.
+
 `2.5.0`_ (26 May 2022)
 ----------------------
 - Add customization of **Server** header
diff --git a/requires/installation.txt b/requires/installation.txt
index 616640f..9993ef8 100644
--- a/requires/installation.txt
+++ b/requires/installation.txt
@@ -1 +1,2 @@
+setuptools>=64
 tornado>=5,<7
diff --git a/setup.py b/setup.py
index 4887be5..46b6310 100755
--- a/setup.py
+++ b/setup.py
@@ -45,10 +45,6 @@ def read_requirements(name):
         'Natural Language :: English',
         'Operating System :: OS Independent',
         '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 :: Implementation :: CPython',
diff --git a/tests.py b/tests.py
index 71db30b..646956a 100644
--- a/tests.py
+++ b/tests.py
@@ -532,7 +532,7 @@ def test_that_calling_with_non_sprockets_application_is_deprecated(self):
         self.assertEqual(len(captured), 0)
 
 
-class AsyncRunTests(unittest.TestCase):
+class AsyncRunTests(unittest.IsolatedAsyncioTestCase):
 
     def test_that_on_start_callbacks_are_invoked(self):
         future = concurrent.Future()
diff --git a/tox.ini b/tox.ini
index eb3930c..4442426 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py38,py39,tornado,tornado50
+envlist = py39,tornado,tornado50
 indexserver =
 	default = https://pypi.python.org/simple
 toxworkdir = build/tox