diff --git a/.github/workflows/commitizen.yml b/.github/workflows/commitizen.yml
index 106b920..18bfb96 100644
--- a/.github/workflows/commitizen.yml
+++ b/.github/workflows/commitizen.yml
@@ -8,12 +8,12 @@ jobs:
   check_pr_title:
     name: check_pr_title
     if: github.event_name == 'pull_request'
-    uses: dfinity/ci-tools/.github/workflows/check-pr-title.yaml@main
+    uses: dfinity/ci-tools/.github/workflows/check-pr-title.yaml@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
   check_commit_messages:
     name: check_commit_messages
     if: github.event_name == 'merge_group'
-    uses: dfinity/ci-tools/.github/workflows/check-commit-messages.yaml@main
+    uses: dfinity/ci-tools/.github/workflows/check-commit-messages.yaml@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
   commitizen:
     name: commitizen:required
diff --git a/.github/workflows/create-release-pr.yml b/.github/workflows/create-release-pr.yml
index 4542b2f..bb99a35 100644
--- a/.github/workflows/create-release-pr.yml
+++ b/.github/workflows/create-release-pr.yml
@@ -18,29 +18,29 @@ jobs:
       contents: write
     steps:
       - name: Create GitHub App Token
-        uses: actions/create-github-app-token@v1
+        uses: actions/create-github-app-token@d72941d797fd3113feb6b93fd0dec494b13a2547 # v1.12.0
         id: generate_token
         with:
           app-id: ${{ vars.PR_AUTOMATION_BOT_PUBLIC_APP_ID }}
           private-key: ${{ secrets.PR_AUTOMATION_BOT_PUBLIC_PRIVATE_KEY }}
 
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
         with:
           fetch-depth: 0
 
       - name: Setup Python
-        uses: dfinity/ci-tools/actions/setup-python@main
+        uses: dfinity/ci-tools/actions/setup-python@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Setup Commitizen
-        uses: dfinity/ci-tools/actions/setup-commitizen@main
+        uses: dfinity/ci-tools/actions/setup-commitizen@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Setup PNPM
-        uses: dfinity/ci-tools/actions/setup-pnpm@main
+        uses: dfinity/ci-tools/actions/setup-pnpm@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Bump version
         id: bump_version
-        uses: dfinity/ci-tools/actions/bump-version@main
+        uses: dfinity/ci-tools/actions/bump-version@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
         with:
           prerelease: ${{ inputs.beta_release == true && 'beta' || '' }}
           major_version_zero: true
@@ -52,7 +52,7 @@ jobs:
         run: echo "Bumping to version ${{ steps.bump_version.outputs.version }}"
 
       - name: Create Pull Request
-        uses: dfinity/ci-tools/actions/create-pr@main
+        uses: dfinity/ci-tools/actions/create-pr@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
         with:
           token: ${{ steps.generate_token.outputs.token }}
           branch_name: 'release/${{ steps.bump_version.outputs.version }}'
diff --git a/.github/workflows/generate-changelog.yml b/.github/workflows/generate-changelog.yml
index 9258930..96d0761 100644
--- a/.github/workflows/generate-changelog.yml
+++ b/.github/workflows/generate-changelog.yml
@@ -7,7 +7,7 @@ on:
 
 jobs:
   generate_changelog:
-    uses: dfinity/ci-tools/.github/workflows/generate-changelog.yaml@main
+    uses: dfinity/ci-tools/.github/workflows/generate-changelog.yaml@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
     with:
       token_app_id: ${{ vars.PR_AUTOMATION_BOT_PUBLIC_APP_ID }}
       environment: create-prs
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 08d0f81..7648177 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Setup PNPM
-        uses: dfinity/ci-tools/actions/setup-pnpm@main
+        uses: dfinity/ci-tools/actions/setup-pnpm@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Check TypeScript Formatting
         run: pnpm format:check
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2a51406..f3a3755 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -20,30 +20,30 @@ jobs:
       id-token: write
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
 
       - name: Setup Python
-        uses: dfinity/ci-tools/actions/setup-python@main
+        uses: dfinity/ci-tools/actions/setup-python@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Setup Commitizen
-        uses: dfinity/ci-tools/actions/setup-commitizen@main
+        uses: dfinity/ci-tools/actions/setup-commitizen@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Setup PNPM
-        uses: dfinity/ci-tools/actions/setup-pnpm@main
+        uses: dfinity/ci-tools/actions/setup-pnpm@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Determine if Beta Release
         id: is_beta
-        uses: dfinity/ci-tools/actions/is-beta-tag@main
+        uses: dfinity/ci-tools/actions/is-beta-tag@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Build NPM packages
         run: pnpm build
 
       - name: Generate release notes
-        uses: dfinity/ci-tools/actions/generate-release-notes@main
+        uses: dfinity/ci-tools/actions/generate-release-notes@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Publish to npm
         id: publish
-        uses: dfinity/ci-tools/actions/npm-publish@main
+        uses: dfinity/ci-tools/actions/npm-publish@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
         with:
           is_beta: ${{ steps.is_beta.outputs.is_beta_tag }}
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b163bee..6b9d586 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,10 +10,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
 
       - name: Setup PNPM
-        uses: dfinity/ci-tools/actions/setup-pnpm@main
+        uses: dfinity/ci-tools/actions/setup-pnpm@afeee4fbdc0683a88ec5a74ed7f59a2ce0e833ad # main
 
       - name: Test
         run: pnpm test