diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c19fb66..c342d4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,87 +7,46 @@ on:
   pull_request:
 
 jobs:
-  Windows:
-    name: 'Windows (${{ matrix.python }})'
-    timeout-minutes: 20
-    runs-on: 'windows-latest'
+  test:
     strategy:
       fail-fast: false
       matrix:
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12-dev']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        os:
+          - macos-latest
+          - windows-latest
+          - ubuntu-latest
+        include:
+          - python-version: pypy3.10
+            os: ubuntu-latest
+    name: ${{ fromJson('{"macos-latest":"macOS","windows-latest":"Windows","ubuntu-latest":"Ubuntu"}')[matrix.os] }} (${{ matrix.python-version }})
+    timeout-minutes: 20
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup python
         uses: actions/setup-python@v5
         with:
-          python-version: '${{ matrix.python }}'
+          python-version: '${{ matrix.python-version }}'
+          allow-prereleases: true
       - name: Run tests
         run: ./ci.sh
         shell: bash
       - name: "Upload coverage data"
         uses: "actions/upload-artifact@v4"
         with:
-          name: coverage-data-windows-${{ matrix.python }}
+          name: coverage-data-${{ matrix.os }}-${{ matrix.python-version }}
           path: .coverage.*
           include-hidden-files: true
           if-no-files-found: ignore
 
-  Ubuntu:
-    name: 'Ubuntu (${{ matrix.python }})'
-    timeout-minutes: 10
-    runs-on: 'ubuntu-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12-dev', 'pypy3.9', 'pypy-3.10']
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '${{ matrix.python }}'
-      - name: Run tests
-        run: ./ci.sh
-      - name: "Upload coverage data"
-        uses: "actions/upload-artifact@v4"
-        with:
-          name: coverage-data-ubuntu-${{ matrix.python }}
-          path: .coverage.*
-          include-hidden-files: true
-          if-no-files-found: ignore
-
-  macOS:
-    name: 'macOS (${{ matrix.python }})'
-    timeout-minutes: 10
-    runs-on: 'macos-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12-dev']
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v5
-        with:
-          python-version: '${{ matrix.python }}'
-      - name: Run tests
-        run: ./ci.sh
-      - name: "Upload coverage data"
-        uses: "actions/upload-artifact@v4"
-        with:
-          name: coverage-data-macos-${{ matrix.python }}
-          path: .coverage.*
-          include-hidden-files: true
-          if-no-files-found: ignore
 
   coverage:
     name: Combine & check coverage
     if: always()
     runs-on: "ubuntu-latest"
-    needs: ["Windows", "Ubuntu", "macOS"]
+    needs: test
 
     steps:
       - uses: actions/checkout@v4
diff --git a/setup.py b/setup.py
index 6da15ce..872cc3a 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
     },
     package_dir={'': 'src'},
     url="https://github.com/python-trio/trustme",
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     install_requires=[
         "cryptography>=3.1",
         "idna>=2.0",
@@ -32,11 +32,11 @@
         "Programming Language :: Python :: Implementation :: PyPy",
         "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",
         "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Topic :: System :: Networking",
         "Topic :: Security :: Cryptography",
         "Topic :: Software Development :: Testing",