diff --git a/.github/workflows/testcext.yml b/.github/workflows/testcext.yml
index 76357dab9..8d5ca2611 100644
--- a/.github/workflows/testcext.yml
+++ b/.github/workflows/testcext.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -20,6 +20,7 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 3c0460bd7..aaab4eaf4 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -14,15 +14,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # doesn't work with CPython 3.9
-        python-version: ['3.10', '3.11', '3.12', 'pypy-3.9']
-
+        python-version: ['3.10', '3.11', '3.12', '3.13', 'pypy-3.10']
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip