diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6402104..5cb212a 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -12,13 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure Python version
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.7"
-          architecture: x64
 
       - name: black
         run: |
@@ -40,24 +39,31 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python_version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python_version: [ "3.12" ]
         include:
           - os: windows-2019
             python_version: "3.6"
-          - os: ubuntu-20.04
-            python_version: "3.6"
+          - os: ubuntu-latest
+            python_version: "3.7"
+          - os: windows-latest
+            python_version: "3.8"
+          - os: macos-latest
+            python_version: "3.9"
+          - os: ubuntu-latest
+            python_version: "3.10"
+          - os: windows-latest
+            python_version: "3.11"
 
     runs-on: ${{ matrix.os }}
 
     steps:
       - name: Check out repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure Python version
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python_version }}
-          architecture: x64
 
       - name: Build sdist
         run: |
diff --git a/setup.cfg b/setup.cfg
index 41c66c8..ebecd88 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -23,6 +23,7 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Topic :: Scientific/Engineering
 
 [options]