diff --git a/.github/workflows/auto-merge-dependabot.yml b/.github/workflows/auto-merge-dependabot.yml
index 9d903943..a3343774 100644
--- a/.github/workflows/auto-merge-dependabot.yml
+++ b/.github/workflows/auto-merge-dependabot.yml
@@ -19,7 +19,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v3.1.0
+        uses: dependabot/fetch-metadata@25dd0e34f4fe68f24cc83900b1fe3fe149efef98 # v3.1.0
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 
diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index c4680701..255a058f 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -17,7 +17,7 @@ jobs:
       GITHUB_RUN_NUMBER: ${{ github.run_number }}
     steps:
       - name: Setup .NET
-        uses: actions/setup-dotnet@v6
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: 8.0.x
 
@@ -44,7 +44,7 @@ jobs:
 
       - name: Checkout repository
         id: checkout_repo
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           fetch-depth: 0
@@ -52,7 +52,7 @@ jobs:
       - if: steps.conditionals_handler.outputs.is_default_branch == 'true'
         name: Bump GH tag
         id: tag_generator
-        uses: mathieudutour/github-tag-action@v6.2
+        uses: mathieudutour/github-tag-action@a22cf08638b34d5badda920f9daf6e72c477b07b # v6.2
         with: 
           github_token: ${{ secrets.GITHUB_TOKEN }}
           default_bump: false
@@ -129,7 +129,7 @@ jobs:
 
       - name: Create and publish release
         id: create_release
-        uses: softprops/action-gh-release@v3
+        uses: softprops/action-gh-release@3d0d9888cb7fd7b750713d6e236d1fcb99157228 # v3.0.2
         with:
           name: OpenAPI.Net.OData v${{ needs.ci.outputs.latest_version }}
           tag_name: v${{ needs.ci.outputs.latest_version }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index fea7900d..34647017 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,16 +39,16 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v7
+      uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       
     - name: Setup .NET
-      uses: actions/setup-dotnet@v6
+      uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
       with:
         dotnet-version: 8.0.x
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4.37.6
+      uses: github/codeql-action/init@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.6
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -76,4 +76,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4.37.6
+      uses: github/codeql-action/analyze@5595ccaf912efad79be6eef63a5619ff05969be3 # v4.37.6
diff --git a/.github/workflows/release-please-gha.yml b/.github/workflows/release-please-gha.yml
index 649a724e..31b2ea29 100644
--- a/.github/workflows/release-please-gha.yml
+++ b/.github/workflows/release-please-gha.yml
@@ -34,17 +34,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
 
       - name: Generate GitHub App token
         id: app-token
-        uses: actions/create-github-app-token@v3
+        uses: actions/create-github-app-token@bcd2ba49218906704ab6c1aa796996da409d3eb1 # v3.2.0
         with:
           client-id: ${{ vars.RELEASE_PLEASE_TOKEN_PROVIDER_APP_ID }}
           private-key: ${{ secrets.RELEASE_PLEASE_TOKEN_PROVIDER_PEM }}
 
       - name: Release Please
-        uses: googleapis/release-please-action@v5
+        uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5.0.0
         with:
           token: ${{ steps.app-token.outputs.token }}
           config-file: release-please-config.json
diff --git a/.github/workflows/sonarcloud.yml b/.github/workflows/sonarcloud.yml
index 092f7c29..c4878f51 100644
--- a/.github/workflows/sonarcloud.yml
+++ b/.github/workflows/sonarcloud.yml
@@ -36,19 +36,19 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Set up JDK 17
-        uses: actions/setup-java@v5.7.0
+        uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
         with:
           distribution: 'adopt'
           java-version: 17
       - name: Setup .NET
-        uses: actions/setup-dotnet@v6
+        uses: actions/setup-dotnet@a98b56852c35b8e3190ac28c8c2271da59106c68 # v6.0.0
         with:
           dotnet-version: 8.0.x
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
       - name: Cache SonarCloud packages
-        uses: actions/cache@v6
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: ~/.sonar/cache
           key: ${{ runner.os }}-sonar
diff --git a/.github/workflows/validate-descriptions.yml b/.github/workflows/validate-descriptions.yml
index 1493c621..b7a4580f 100644
--- a/.github/workflows/validate-descriptions.yml
+++ b/.github/workflows/validate-descriptions.yml
@@ -13,7 +13,7 @@ jobs:
     outputs:
       matrix: ${{ steps.set-descriptions.outputs.matrix }}
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       - id: set-descriptions
         run: echo "::set-output name=matrix::$(ls test/**/Resources/*.{json,yaml} | sed 's/.*\///' | jq -R -s -c 'split("\n")[:-1]')"
 
@@ -26,11 +26,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v7
+    - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
       with:
         submodules: recursive
 
     - name: Validate description with redocly
-      uses: fluximus-prime/redocly-cli-github-action@v1
+      uses: fluximus-prime/redocly-cli-github-action@db9f109674644db10fa51723b7eb83938ed24f7d # v1
       with:
         args: 'lint test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/${{ matrix.descriptions }} --max-problems 1000 --config redocly.yaml'
\ No newline at end of file