diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6fc1694..03e883e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,10 +17,17 @@ jobs:
         with:
           persist-credentials: false
 
+      - name: Download shellcheck
+        run: |
+          curl --fail --silent --show-error --location --output /tmp/shellcheck.tar.xz \
+            "https://github.com/koalaman/shellcheck/releases/download/v0.11.0/shellcheck-v0.11.0.linux.x86_64.tar.xz"
+          echo "8c3be12b05d5c177a04c29e3c78ce89ac86f1595681cab149b65b97c4e227198  /tmp/shellcheck.tar.xz" | sha256sum -c -
+          tar --extract --xz --file /tmp/shellcheck.tar.xz --directory /tmp
+        shell: bash
+
       - name: Shellcheck
-        uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38 # 2.0.0
-        with:
-          scandir: "."
+        run: find . -type f -name "*.sh" -print0 | xargs -0 /tmp/shellcheck-v0.11.0/shellcheck
+        shell: bash
 
       - name: Download actionlint
         run: bash <(curl --fail --silent --show-error --location "https://raw.githubusercontent.com/rhysd/actionlint/011a6d15e749bb3f2d771eed9c7aa0e7e3e10ee7/scripts/download-actionlint.bash")