diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4556f39..24ee53c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,11 +10,6 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - name: "linux aarch64 38"
-            os: ubuntu-latest
-            arch: aarch64
-            build: "cp38*"
-            pyversion: 38
           - name: "linux aarch64 39"
             os: ubuntu-latest
             arch: aarch64
@@ -45,11 +40,11 @@ jobs:
             arch: aarch64
             build: "cp314*"
             pyversion: 314
-          - name: "linux ppc64le 38"
+          - name: "linux aarch64 315"
             os: ubuntu-latest
-            arch: ppc64le
-            build: "cp38*"
-            pyversion: 38
+            arch: aarch64
+            build: "cp315*"
+            pyversion: 315
           - name: "linux ppc64le 39"
             os: ubuntu-latest
             arch: ppc64le
@@ -80,11 +75,11 @@ jobs:
             arch: ppc64le
             build: "cp314*"
             pyversion: 314
-          - name: "linux s390x 38"
+          - name: "linux ppc64le 315"
             os: ubuntu-latest
-            arch: s390x
-            build: "cp38*manylinux*"
-            pyversion: 38
+            arch: ppc64le
+            build: "cp315*"
+            pyversion: 315
           - name: "linux s390x 39"
             os: ubuntu-latest
             arch: s390x
@@ -115,11 +110,11 @@ jobs:
             arch: s390x
             build: "cp314*manylinux*"
             pyversion: 314
-          - name: "linux riscv64 38"
+          - name: "linux s390x 315"
             os: ubuntu-latest
-            arch: riscv64
-            build: "cp38*"
-            pyversion: 38
+            arch: s390x
+            build: "cp315*manylinux*"
+            pyversion: 315
           - name: "linux riscv64 39"
             os: ubuntu-latest
             arch: riscv64
@@ -150,6 +145,11 @@ jobs:
             arch: riscv64
             build: "cp314*"
             pyversion: 314
+          - name: "linux riscv64 315"
+            os: ubuntu-latest
+            arch: riscv64
+            build: "cp315*"
+            pyversion: 315
           - name: windoof
             os: windows-latest
             build: "*"
@@ -170,10 +170,10 @@ jobs:
           platforms: ${{ matrix.config.arch }}
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.4.1
+        uses: pypa/cibuildwheel@v4.1.0
         env:
           CIBW_BUILD: ${{ matrix.config.build }}
-          CIBW_SKIP: "pp*-win_amd64 pp39*linux* pp31?*linux_i686 pp*-mac* pp38-*linux*"
+          CIBW_SKIP: "pp*-win_amd64 pp39*linux* pp31?*linux_i686 pp*-mac*"
           CIBW_ARCHS_LINUX: "${{ matrix.config.arch }}"
           # CIBW_TEST_COMMAND: pip install pytest && pytest {package}
         # with:
diff --git a/.github/workflows/build.yml.sh b/.github/workflows/build.yml.sh
index ff5e946..452d5bb 100644
--- a/.github/workflows/build.yml.sh
+++ b/.github/workflows/build.yml.sh
@@ -13,7 +13,7 @@ jobs:
         config:
 EOF
 for arch in aarch64 ppc64le s390x riscv64 ; do
-    for py in 38 39 310 311 312 313 314 ; do
+    for py in 39 310 311 312 313 314 315 ; do
         build="cp${py}*"
         test $arch = s390x && build="cp$py*manylinux*"
         cat <<EOF
@@ -37,28 +37,27 @@ cat <<'EOF'
             build: "*"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up QEMU
         if: ${{ contains(matrix.config.name, 'linux') }}
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v4
         with:
           platforms: ${{ matrix.config.arch }}
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v3.1.4
+        uses: pypa/cibuildwheel@v4.1.0
         env:
           CIBW_BUILD: ${{ matrix.config.build }}
-          CIBW_SKIP: "pp*-win_amd64 pp39*linux* pp31?*linux_i686 pp*-mac* pp38-*linux*"
+          CIBW_SKIP: "pp*-win_amd64 pp39*linux* pp31?*linux_i686 pp*-mac*"
           CIBW_ARCHS_LINUX: "${{ matrix.config.arch }}"
-          CIBW_ENABLE: cpython-freethreading
           # CIBW_TEST_COMMAND: pip install pytest && pytest {package}
         # with:
         #   package-dir: .
         #   output-dir: wheelhouse
         #   config-file: "{package}/pyproject.toml"
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: "dist-${{ matrix.config.os }}-${{ matrix.config.arch }}-${{ matrix.config.pyversion }}"
           path: ./wheelhouse/*.whl
@@ -68,7 +67,7 @@ cat <<'EOF'
     name: Make SDist
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 100  # Optional, use if you use setuptools_scm
         submodules: true  # Optional, use if you have submodules
@@ -76,7 +75,7 @@ cat <<'EOF'
     - name: Build SDist
       run: pipx run build --sdist
 
-    - uses: actions/upload-artifact@v4
+    - uses: actions/upload-artifact@v7
       with:
         name: dist-sdist
         path: dist/*.tar.gz
@@ -90,7 +89,7 @@ cat <<'EOF'
     runs-on: ubuntu-latest
     if: startsWith(github.ref, 'refs/tags/v')
     steps:
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v8
       with:
         path: dist
         pattern: dist-*