diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cb31c169d..c11187d21 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,11 +36,13 @@ jobs:
             target: s390x
           - runner: ubuntu-22.04
             target: ppc64le
+        python:
+          - "3.12"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: ${{ matrix.python }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
         with:
@@ -67,11 +69,13 @@ jobs:
             target: aarch64
           - runner: ubuntu-22.04
             target: armv7
+        python:
+          - "3.12"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: ${{ matrix.python }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
         with:
@@ -94,11 +98,13 @@ jobs:
             target: x64
           - runner: windows-latest
             target: x86
+        python:
+          - "3.12"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: ${{ matrix.python }}
           architecture: ${{ matrix.platform.target }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
@@ -121,11 +127,13 @@ jobs:
             target: x86_64
           - runner: macos-14
             target: aarch64
+        python:
+          - "3.12"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.x
+          python-version: ${{ matrix.python }}
       - name: Build wheels
         uses: PyO3/maturin-action@v1
         with: