diff --git a/.github/workflows/lint_golang.yml b/.github/workflows/lint_golang.yml
index 5305ea8..256bb98 100644
--- a/.github/workflows/lint_golang.yml
+++ b/.github/workflows/lint_golang.yml
@@ -15,15 +15,15 @@ jobs:
     name: Lint with GolangCI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-go@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6
         id: go
         with:
           go-version-file: go.mod
           # We use a manually configured cache key to avoid conflicts with the test action cache
           # See https://github.com/actions/setup-go/issues/358
           cache: false
-      - uses: actions/cache@v5
+      - uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
         with:
           path: |
             ~/.cache/go-build
@@ -32,7 +32,7 @@ jobs:
           restore-keys: |
             ${{runner.os}}-go-${{steps.go.outputs.go-version}}-lint
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v9
+        uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9
         with:
           version: v2.10.1
           args: --verbose
diff --git a/.github/workflows/pr_title.yml b/.github/workflows/pr_title.yml
index 8a6f52a..38710a8 100644
--- a/.github/workflows/pr_title.yml
+++ b/.github/workflows/pr_title.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       # Please look up the latest version from
       # https://github.com/amannn/action-semantic-pull-request/releases
-      - uses: amannn/action-semantic-pull-request@v6
+      - uses: amannn/action-semantic-pull-request@48f256284bd46cdaab1048c3721360e808335d50 # v6
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
diff --git a/.github/workflows/regen.yml b/.github/workflows/regen.yml
index 62a2812..5b4d170 100644
--- a/.github/workflows/regen.yml
+++ b/.github/workflows/regen.yml
@@ -12,15 +12,15 @@ jobs:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-go@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+      - uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6
         id: go
         with:
           go-version-file: go.mod
           # We use a manually configured cache key to avoid conflicts with the test action cache
           # See https://github.com/actions/setup-go/issues/358
           cache: false
-      - uses: actions/cache@v5
+      - uses: actions/cache@668228422ae6a00e4ad889ee87cd7109ec5666a7 # v5
         with:
           path: |
             ~/.cache/go-build
@@ -41,7 +41,7 @@ jobs:
           make clone
           make gen-proto
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v8
+        uses: peter-evans/create-pull-request@c0f553fe549906ede9cf27b5156039d195d2ece0 # v8
         with:
           # required so the PR triggers workflow runs
           token: ${{ secrets.GH_CQ_BOT }}
diff --git a/.github/workflows/release_pr.yml b/.github/workflows/release_pr.yml
index da07aea..a22502b 100644
--- a/.github/workflows/release_pr.yml
+++ b/.github/workflows/release_pr.yml
@@ -11,7 +11,7 @@ jobs:
   release-please:
     runs-on: ubuntu-latest
     steps:
-      - uses: googleapis/release-please-action@v4
+      - uses: googleapis/release-please-action@16a9c90856f42705d54a6fda1823352bdc62cf38 # v4
         id: release
         with:
           token: ${{ secrets.GH_CQ_BOT }}
@@ -30,7 +30,7 @@ jobs:
         with:
           prerelease: true
       - name: Trigger Renovate
-        uses: actions/github-script@v8
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8
         if: steps.release.outputs.release_created && steps.semver_parser.outputs.prerelease == ''
         with:
           github-token: ${{ secrets.GH_CQ_BOT }}
diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 7c6ca6b..2f9ab36 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -20,9 +20,9 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
       - name: Set up Go 1.x
-        uses: actions/setup-go@v6
+        uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6
         with:
           go-version-file: go.mod
       - run: go mod download