diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d1707e5..02d2c2b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,9 +19,9 @@ jobs:
         os: [ubuntu-latest, windows-latest]
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
       with:
         go-version-file: 'go.mod'
     - name: Run tests
diff --git a/.github/workflows/e2e.yml b/.github/workflows/e2e.yml
index 57153c8..8e92a88 100644
--- a/.github/workflows/e2e.yml
+++ b/.github/workflows/e2e.yml
@@ -22,9 +22,9 @@ jobs:
       TFLINT_VERSION: ${{ matrix.version }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
       with:
         go-version-file: 'go.mod'
     - name: Install TFLint
diff --git a/.github/workflows/goreleaser.yml b/.github/workflows/goreleaser.yml
index 94d7e8b..376d2ae 100644
--- a/.github/workflows/goreleaser.yml
+++ b/.github/workflows/goreleaser.yml
@@ -13,15 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         fetch-depth: 0
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
       with:
         go-version-file: 'go.mod'
     - name: Run GoReleaser
-      uses: goreleaser/goreleaser-action@v6
+      uses: goreleaser/goreleaser-action@90a3faa9d0182683851fbfa97ca1a2cb983bfca3 # v6.2.1
       with:
         version: v2.7.0
         args: check
diff --git a/.github/workflows/maintenance.yml b/.github/workflows/maintenance.yml
index 72e492f..d0f778e 100644
--- a/.github/workflows/maintenance.yml
+++ b/.github/workflows/maintenance.yml
@@ -8,9 +8,9 @@ jobs:
   job:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - run: git submodule update --init --depth=0
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
         with:
           go-version-file: 'go.mod'
       - name: make tflint in tools/magic-modules
@@ -21,7 +21,7 @@ jobs:
           make tflint
         env:
           OUTPUT_PATH: ${{ github.workspace }}/rules/magicmodules
-      - uses: peter-evans/create-pull-request@v7
+      - uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
         with:
           commit-message: |
             Update Magic Modules
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 03044d7..5089fd9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -17,22 +17,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
         fetch-depth: 0
     - name: Set up Go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
       with:
         go-version-file: 'go.mod'
     - name: Install Cosign
-      uses: sigstore/cosign-installer@v3
+      uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
     - name: Run GoReleaser
-      uses: goreleaser/goreleaser-action@v6
+      uses: goreleaser/goreleaser-action@90a3faa9d0182683851fbfa97ca1a2cb983bfca3 # v6.2.1
       with:
         version: v2.7.0
         args: release --release-notes tools/release/release-note.md
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-    - uses: actions/attest-build-provenance@v2
+    - uses: actions/attest-build-provenance@c074443f1aee8d4aeeae555aebba3282517141b2 # v2.2.3
       with:
         subject-path: 'dist/checksums.txt'