diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 63e9b4b..c29dbcf 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -3,7 +3,8 @@ name: Go
 on: [push]
 
 env:
-  GO_VERSION: '>=1.21.0'
+  GO_VERSION: '>=1.22.0'
+  GOEXPERIMENT: rangefunc
 
 jobs:
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
deleted file mode 100644
index 90f34a2..0000000
--- a/.github/workflows/release.yml
+++ /dev/null
@@ -1,131 +0,0 @@
-name: Release
-
-on: [push]
-
-permissions:
-  contents: write
-
-env:
-  GO_VERSION: '>=1.21.0'
-  NAME: 'inflater'
-
-jobs:
-
-  build:
-
-    name: Build
-    runs-on: ${{ matrix.os }}
-
-    strategy:
-      matrix:
-        os: [ ubuntu-latest, macos-latest, windows-latest ]
-        arch: [ amd64, arm64 ]
-        exclude:
-        - os: windows-latest
-          arch: arm64
-
-    steps:
-
-    - uses: actions/checkout@v4
-    - uses: actions/setup-go@v5
-      with:
-        go-version: ${{ env.GO_VERSION }}
-
-    - name: Setup env
-      id: setup
-      shell: bash
-      run: |
-        if [[ ${GITHUB_REF} =~ ^refs/tags/v[0-9]+\.[0-9]+ ]] ; then
-          export VERSION=${GITHUB_REF_NAME}
-        else
-          export VERSION=SNAPSHOT
-        fi
-        echo "VERSION=${VERSION}" >> $GITHUB_ENV
-        case ${{ matrix.os }} in
-          ubuntu-*)
-            if [ "${{ matrix.arch }}" = "arm64" ] ; then
-              sudo apt-get update
-              sudo apt-get -y install gcc-12-aarch64-linux-gnu
-              echo "CC=aarch64-linux-gnu-gcc-12" >> $GITHUB_ENV
-            fi
-            export GOOS=linux
-            export PKGEXT=.tar.gz
-            ;;
-          macos-*)
-            export GOOS=darwin
-            export PKGEXT=.zip
-            ;;
-          windows-*)
-            choco install zip
-            export GOOS=windows
-            export PKGEXT=.zip
-            ;;
-        esac
-        export GOARCH=${{ matrix.arch }}
-        echo "GOOS=${GOOS}" >> $GITHUB_ENV
-        echo "GOARCH=${GOARCH}" >> $GITHUB_ENV
-        echo "CGO_ENABLED=1" >> $GITHUB_ENV
-        echo "PKGNAME=${NAME}_${VERSION}_${GOOS}_${GOARCH}" >> $GITHUB_ENV
-        echo "PKGEXT=${PKGEXT}" >> $GITHUB_ENV
-
-    - name: Build
-      shell: bash
-      run: |
-        go build
-
-    - name: Archive
-      shell: bash
-      run: |
-        rm -rf _build/${PKGNAME}
-        mkdir -p _build/${PKGNAME}
-        cp -p ${NAME} _build/${PKGNAME}
-        cp -p LICENSE _build/${PKGNAME}
-        cp -p README.md _build/${PKGNAME}
-
-        case "${PKGEXT}" in
-          ".tar.gz")
-            tar cf _build/${PKGNAME}${PKGEXT} -C _build ${PKGNAME}
-            ;;
-          ".zip")
-            (cd _build && zip -r9q ${PKGNAME}${PKGEXT} ${PKGNAME})
-            ;;
-        esac
-        ls -laFR _build
-
-    - name: Artifact upload
-      uses: actions/upload-artifact@v4
-      with:
-        name: ${{ env.GOOS }}_${{ env.GOARCH }}
-        path: _build/${{ env.PKGNAME }}${{ env.PKGEXT }}
-
-  create-release:
-    name: Create release
-    runs-on: ubuntu-latest
-    if: startsWith(github.ref, 'refs/tags/')
-    needs:
-    - build
-    steps:
-    - uses: actions/download-artifact@v4
-      with: { name: darwin_amd64 }
-    - uses: actions/download-artifact@v4
-      with: { name: darwin_arm64 }
-    - uses: actions/download-artifact@v4
-      with: { name: linux_amd64 }
-    - uses: actions/download-artifact@v4
-      with: { name: linux_arm64 }
-    - uses: actions/download-artifact@v4
-      with: { name: windows_amd64 }
-    - run: ls -lafR
-    - name: Release
-      uses: softprops/action-gh-release@v2
-      with:
-        draft: true
-        prerelease: ${{ contains(github.ref_name, '-alpha.') || contains(github.ref_name, '-beta.') }}
-        files: |
-          *.tar.gz
-          *.zip
-        fail_on_unmatched_files: true
-        generate_release_notes: true
-        append_body: true
-
-# based on: github.com/koron-go/_skeleton/.github/workflows/release.yml
diff --git a/go.mod b/go.mod
index 2099072..6b11b50 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,3 @@
 module github.com/koron-go/inflater
 
-go 1.21
+go 1.22.5