diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0884df1..a2bdde0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
     - name: Setup Python
       uses: actions/setup-python@v5
       with:
-        python-version: 3.x
+        python-version: 3.13
         cache: pip
         cache-dependency-path: |
           requirements/*.txt
@@ -66,10 +66,9 @@ jobs:
     needs: [lint]
     strategy:
       matrix:
-        pyver: ['3.8', '3.9', '3.10', '3.11']
-        os: [ubuntu, macos, windows]
+        pyver: ['3.9', '3.10', '3.11', '3.12', '3.13']
       fail-fast: false
-    runs-on: ${{ matrix.os }}-latest
+    runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
     - name: Checkout
diff --git a/MANIFEST.in b/MANIFEST.in
index 0912bc1..cd714e4 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -8,11 +8,4 @@ graft docs
 graft tests
 global-include *.pyi
 global-exclude *.pyc
-global-exclude *.pyd
-global-exclude *.so
-global-exclude *.lib
-global-exclude *.dll
-global-exclude *.a
-global-exclude *.obj
-exclude aiosignal.html
 prune docs/_build
diff --git a/setup.cfg b/setup.cfg
index 741d83b..6962e7b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,6 @@
+[bdist_wheel]
+universal = True
+
 [metadata]
 name = aiosignal
 version = attr: aiosignal.__version__
@@ -24,10 +27,6 @@ classifiers =
   Programming Language :: Python
   Programming Language :: Python :: 3
   Programming Language :: Python :: 3 :: Only
-  Programming Language :: Python :: 3.8
-  Programming Language :: Python :: 3.9
-  Programming Language :: Python :: 3.10
-  Programming Language :: Python :: 3.11
 
   Development Status :: 5 - Production/Stable
   Operating System :: POSIX
@@ -36,7 +35,7 @@ classifiers =
   Framework :: AsyncIO
 
 [options]
-python_requires = >=3.8
+python_requires = >=3.9
 packages = find:
 include_package_data = True
 
@@ -77,6 +76,7 @@ norecursedirs = dist docs build .tox .eggs
 minversion = 3.8.2
 testpaths = tests/
 asyncio_mode = strict
+asyncio_default_fixture_loop_scope = function
 
 [coverage:run]
 branch = True
diff --git a/tox.ini b/tox.ini
index be4b8fd..d5f0b70 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 
-envlist = check, clean, {py38,py39,py310,py311}-{debug,release}, report
+envlist = check, clean, {py39,py310,py311,py312,py313}, report
 
 [testenv]
 
@@ -16,9 +16,6 @@ deps =
 commands =
     pytest --cov-append {posargs}
 
-setenv =
-    debug: PYTHONASYNCIODEBUG = 1
-
 [testenv:check]
 
 deps =
@@ -26,13 +23,16 @@ deps =
     flake8
     docutils
     pygments
+    twine
+    build
 
 commands =
     flake8 aiosignal tests
-    python setup.py check -rms
+    python -m build
+    python -m twine check --strict dist/*
 
 basepython:
-    python3.10
+    python3.13
 
 [testenv:clean]
 
@@ -43,7 +43,7 @@ commands =
     coverage erase
 
 basepython:
-    python3.10
+    python3.13
 
 [testenv:report]
 
@@ -55,8 +55,8 @@ commands =
     coverage html
     echo "open file://{toxinidir}/htmlcov/index.html"
 
-whitelist_externals =
+allowlist_externals =
     echo
 
 basepython:
-    python3.10
+    python3.13