diff --git a/.github/workflows/R-CMD-check.yaml b/.github/workflows/R-CMD-check.yaml
index a0c9d50..d7f0427 100644
--- a/.github/workflows/R-CMD-check.yaml
+++ b/.github/workflows/R-CMD-check.yaml
@@ -22,6 +22,7 @@ jobs:
           - {os: macos-latest,   r: 'release'}
           - {os: macos-latest,   r: 'oldrel'}
 
+          - {os: windows-11-arm }
           - {os: windows-latest, r: 'devel'}
           - {os: windows-latest, r: 'release'}
           - {os: windows-latest, r: 'oldrel'}
@@ -47,16 +48,48 @@ jobs:
       - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v2
+        if: matrix.config.os != 'windows-11-arm'
         with:
           r-version: ${{ matrix.config.r }}
           rtools-version: ${{ matrix.config.rtools }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - name: Install R & RTools (ARM64)
+        if: matrix.config.os == 'windows-11-arm'
+        run: |
+          $url = "https://www.r-project.org/nosvn/winutf8/aarch64/R-4-signed/R-4.5.0-aarch64.exe"
+          Invoke-WebRequest `
+              -Uri https://www.r-project.org/nosvn/winutf8/aarch64/R-4-signed/R-4.5.0-aarch64.exe `
+              -OutFile R-4.5.0-aarch64.exe
+          Start-Process `
+              -FilePath R-4.5.0-aarch64.exe `
+              -ArgumentList "/INSTALL /VERYSILENT /SUPPRESSMSGBOXES" -Wait
+
+          Invoke-WebRequest `
+              -Uri https://github.com/r-hub/rtools45/releases/download/latest/rtools45-aarch64.exe `
+              -OutFile "rtools45-aarch64.exe"
+          Start-Process `
+              -FilePath "rtools45-aarch64.exe" `
+              -ArgumentList "/INSTALL /VERYSILENT /SUPPRESSMSGBOXES" -Wait
+
+          echo "C:/rtools45-aarch64/usr/bin;C:/rtools45-aarch64/aarch64-w64-mingw32.static.posix/bin" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
+          echo "C:\Program Files\R-aarch64\R-4.5.0\bin" | Out-File -Append -FilePath $env:GITHUB_PATH -Encoding utf8
+          Remove-Item -Path "R-4.5.0-aarch64.exe"
+          Remove-Item -Path "rtools45-aarch64.exe"
+
+      - name: Install Dependencies (ARM64)
+        if: matrix.config.os == 'windows-11-arm'
+        run: |
+          install.packages(c("tinytest", "knitr", "rmarkdown", "rcmdcheck"),
+                           repos = c("https://r-lib.r-universe.dev", "https://cloud.r-project.org"),
+                           Ncpus = 4);
+        shell: Rscript {0}
+
       - uses: r-lib/actions/setup-r-dependencies@v2
+        if: matrix.config.os != 'windows-11-arm'
         with:
-          extra-packages: |
-            any::rcmdcheck
+          extra-packages: any::rcmdcheck
           needs: check
 
       - uses: r-lib/actions/check-r-package@v2