diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index fd34c30e..b7ea66da 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -25,7 +25,7 @@ jobs:
     name: Node.js ${{ matrix.node-version }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Configure Node.js
         uses: actions/setup-node@v6
@@ -51,7 +51,7 @@ jobs:
     name: GitHub Pages
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Configure Node.js
         uses: actions/setup-node@v6
diff --git a/.github/workflows/deploy-github-pages.yaml b/.github/workflows/deploy-github-pages.yaml
index b57775de..d798cd52 100644
--- a/.github/workflows/deploy-github-pages.yaml
+++ b/.github/workflows/deploy-github-pages.yaml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/format.yaml b/.github/workflows/format.yaml
index 842f94fb..5aca2403 100644
--- a/.github/workflows/format.yaml
+++ b/.github/workflows/format.yaml
@@ -17,6 +17,6 @@ jobs:
         uses: DeterminateSystems/nix-installer-action@ef8a148080ab6020fd15196c2084a2eea5ff2d25 # v22
 
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - run: nix flake check
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 971ea629..dd8ebe60 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
         with:
           fetch-depth: 0