diff --git a/.github/workflows/main_push.yml b/.github/workflows/main_push.yml
index d0b67bc..b75000e 100644
--- a/.github/workflows/main_push.yml
+++ b/.github/workflows/main_push.yml
@@ -57,7 +57,7 @@ jobs:
     - uses: pypa/cibuildwheel@v2.19.1
       env:
         MACOSX_DEPLOYMENT_TARGET: 10.14
-        CIBW_BUILD: '*cp311*'
+        CIBW_BUILD: '*cp39*'
 
     - name: Verify clean directory
       run: git diff --exit-code
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 30d3d21..928cdc8 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -20,7 +20,7 @@ jobs:
 
     - uses: actions/setup-python@v5
       with:
-        python-version: "3.11"
+        python-version: "3.9"
 
     - name: "Install system dependencies"
       run: sudo apt update -y && sudo apt install -y libssl-dev libasio-dev
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 43792d3..dd5c776 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -72,17 +72,18 @@ jobs:
         conan config set "storage.path=$env:GITHUB_WORKSPACE/conan_data"
         conan install --build=openssl --install-folder conan_build .
 
-    # - name: Set up QEMU
-    #   if: matrix.platform == 'linux'
-    #   uses: docker/setup-qemu-action@v3
-    #   with:
-    #     platforms: all
+    - name: Set up QEMU
+      if: matrix.platform == 'linux'
+      uses: docker/setup-qemu-action@v3
+      with:
+        platforms: all
 
     - name: Build wheels
       if: matrix.platform != 'macos-arm'
       uses: pypa/cibuildwheel@v2.19.1
       env:
         MACOSX_DEPLOYMENT_TARGET: 13.0
+        CIBW_ARCHS_LINUX: x86_64 aarch64
 
     - name: Build wheels
       if: matrix.platform == 'macos-arm'
diff --git a/README.rst b/README.rst
index d0d7306..3ece7d1 100644
--- a/README.rst
+++ b/README.rst
@@ -110,6 +110,16 @@ Installation of the pre-compiled releases should be as simple as:
 
   pip install pyvroom
 
+The current minimal requirements are as follows:
+
+* Python at least version 3.9.
+* Intel MacOS (or Rosetta2) at least version 13.0.
+* Apple Silicon MacOS at least version 14.0.
+* Windows on AMD64.
+* Linux on x86_64 and Aarch64 given glibc at least version 2.28.
+
+Outside this it might be possible to build your own binaries.
+
 Building from source
 ====================
 
diff --git a/pyproject.toml b/pyproject.toml
index 2d0210c..76f20ed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,13 +27,15 @@ build = "cp3{9,10,11,12}-*"
 skip = "*musllinux*"
 archs = "native"
 manylinux-x86_64-image = "quay.io/pypa/manylinux_2_28_x86_64"
+manylinux-aarch64-image = "quay.io/pypa/manylinux_2_28_aarch64"
 
 [tool.cibuildwheel.linux]
 before-all = """
-yum module enable mariadb-devel:10.3
-yum install -y openssl-devel asio
+dnf update -y
+dnf module enable -y mariadb-devel
+dnf install -y openssl-devel asio-devel
 """
-# archs = ["auto", "aarch64"]
+archs = ["x86_64", "aarch64"]
 
 [[tool.cibuildwheel.overrides]]
 select = "*musllinux*"