diff --git a/.github/workflows/dprint-fmt.yml b/.github/workflows/dprint-fmt.yml
index a4e36bf..b532d24 100644
--- a/.github/workflows/dprint-fmt.yml
+++ b/.github/workflows/dprint-fmt.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
         with:
           fetch-depth: 0
           ref: ${{ github.event.pull_request.base.sha }}
diff --git a/.github/workflows/install-mdbook/action.yml b/.github/workflows/install-mdbook/action.yml
index c085cb9..b4d5cd1 100644
--- a/.github/workflows/install-mdbook/action.yml
+++ b/.github/workflows/install-mdbook/action.yml
@@ -27,7 +27,7 @@ runs:
       shell: bash
 
     - name: Install dependencies
-      uses: taiki-e/install-action@b1acf153d459cd533e9e0d25a07042be1dd2ed71 # v2
+      uses: taiki-e/install-action@05515455a9007c7c6f0b215637566ab8e9872c12 # v2
       with:
         tool: mdbook@${{ steps.mdbook-version.outputs.version }},mdbook-pandoc@${{ steps.mdbook-pandoc-version.outputs.version }},mdbook-last-changed@${{ steps.mdbook-last-changed-version.outputs.version }}
 
diff --git a/.github/workflows/lint-md.yml b/.github/workflows/lint-md.yml
index 25fd968..7a0de16 100644
--- a/.github/workflows/lint-md.yml
+++ b/.github/workflows/lint-md.yml
@@ -9,6 +9,6 @@ jobs:
   style:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
 
       - uses: dprint/check@2f1cf31537886c3bfb05591c031f7744e48ba8a1 # v2.2
diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 4ec02d6..212b930 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -25,7 +25,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
       
       - name: Install mdbook
         uses: ./.github/workflows/install-mdbook
diff --git a/.github/workflows/url-check-on-change.yml b/.github/workflows/url-check-on-change.yml
index b9e8982..e4de306 100644
--- a/.github/workflows/url-check-on-change.yml
+++ b/.github/workflows/url-check-on-change.yml
@@ -9,7 +9,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
       - uses: gaurav-nelson/github-action-markdown-link-check@5c5dfc0ac2e225883c0e5f03a85311ec2830d368 # v1
         with:
           use-verbose-mode: "yes"
diff --git a/.github/workflows/url-check-periodic.yml b/.github/workflows/url-check-periodic.yml
index be1328f..07d3b89 100644
--- a/.github/workflows/url-check-periodic.yml
+++ b/.github/workflows/url-check-periodic.yml
@@ -9,7 +9,7 @@ jobs:
   markdown-link-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4
       - uses: gaurav-nelson/github-action-markdown-link-check@5c5dfc0ac2e225883c0e5f03a85311ec2830d368 # v1
         with:
           use-verbose-mode: "yes"