diff --git a/.github/workflows/dependency-review.yaml b/.github/workflows/dependency-review.yaml
index a9b8d46..cea9a68 100644
--- a/.github/workflows/dependency-review.yaml
+++ b/.github/workflows/dependency-review.yaml
@@ -15,6 +15,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Checkout Repository'
-        uses: actions/checkout@v4
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       - name: 'Dependency Review'
         uses: actions/dependency-review-action@v3
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index d717ee7..278f8d1 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       # Extract metadata (tags, labels) for Docker
       # https://github.com/docker/metadata-action
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 1db67ef..cbbad32 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -20,7 +20,7 @@ jobs:
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v4
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
     - name: Build
       run: go build -v .
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index 94ba739..2459963 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -15,7 +15,7 @@ jobs:
       - uses: actions/setup-go@v4
         with:
           go-version: 1.19
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
diff --git a/.github/workflows/ossf-scorecard.yml b/.github/workflows/ossf-scorecard.yml
index 34e2f5b..7184a84 100644
--- a/.github/workflows/ossf-scorecard.yml
+++ b/.github/workflows/ossf-scorecard.yml
@@ -26,7 +26,7 @@ jobs:
     steps:
       -
         name: "Checkout repo"
-        uses: actions/checkout@v4 # v3.1.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
         with:
           persist-credentials: false
       -
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 34a6ac9..f1cfabf 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -12,7 +12,7 @@ jobs:
       contents: write
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
       with:
         fetch-depth: 0
     - name: Set up Go