diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5f2039d..9e92e79 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          - os: ubuntu-latest
+          - os: ubuntu-24.04-arm
+            architectures: auto armv7l
+          - os: macos-13 # Intel
+          - os: macos-14 # Apple Silicon
+          - os: windows-latest
       fail-fast: false
 
     steps:
@@ -29,6 +35,8 @@ jobs:
 
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
+        env:
+          CIBW_ARCHS: ${{ matrix.architectures || 'auto' }}
 
       - uses: actions/upload-artifact@v4
         with:
diff --git a/pyproject.toml b/pyproject.toml
index e5606cf..6531c6b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ description = """This module performs conversions between Python values \
 and C bit field structs represented as Python \
 byte strings."""
 readme = "README.rst"
-requires-python = ">=3.7"
+requires-python = ">=3.9"
 license = "MIT"
 keywords = [
   "bit field",