diff --git a/.github/workflows/add_backport_label.yml b/.github/workflows/add_backport_label.yml
index eb39db9d..39565ec6 100644
--- a/.github/workflows/add_backport_label.yml
+++ b/.github/workflows/add_backport_label.yml
@@ -8,7 +8,7 @@ jobs:
   add_labels:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions-ecosystem/action-add-labels@v1
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions-ecosystem/action-add-labels@18f1af5e3544586314bbe15c0273249c770b2daf # v1
         with:
           labels: backport 1.x
diff --git a/.github/workflows/backport.yml b/.github/workflows/backport.yml
index b269557a..dcfc6322 100644
--- a/.github/workflows/backport.yml
+++ b/.github/workflows/backport.yml
@@ -26,14 +26,14 @@ jobs:
     steps:
       - name: GitHub App token
         id: github_app_token
-        uses: tibdex/github-app-token@v2
+        uses: tibdex/github-app-token@3beb63f4bd073e61482598c45c71c1019b59b73a # v2
         with:
           app_id: ${{ secrets.APP_ID }}
           private_key: ${{ secrets.APP_PRIVATE_KEY }}
           installation_id: 22958780
 
       - name: Backport
-        uses: VachaShah/backport@v2.2.0
+        uses: VachaShah/backport@142d3b8a8c70dc54db515e653e5ed3c3fac64100 # v2.2.0
         with:
           github_token: ${{ steps.github_app_token.outputs.token }}
           head_template: backport/backport-<%= number %>-to-<%= base %>
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b4a65256..3a190f3b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,13 +11,13 @@ jobs:
   spotless:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Spotless Check
         run: ./gradlew spotlessCheck
   javadoc:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Javadoc CheckStyle
         run: ./gradlew checkstyleMain
       - name: Javadoc Check
@@ -26,9 +26,9 @@ jobs:
     needs: [spotless, javadoc]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Set up JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: 21
           distribution: temurin
@@ -36,13 +36,13 @@ jobs:
         run: |
           ./gradlew check
       - name: Upload Coverage Report
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4
         with:
           file: ./build/reports/jacoco/test/jacocoTestReport.xml
   publish:
     needs: [check]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
     - name: Publish to Maven Local
       run: ./gradlew publishToMavenLocal
diff --git a/.github/workflows/github-merit-badger.yml b/.github/workflows/github-merit-badger.yml
index b6b113a4..b8551f5a 100644
--- a/.github/workflows/github-merit-badger.yml
+++ b/.github/workflows/github-merit-badger.yml
@@ -10,7 +10,7 @@ jobs:
     permissions:
       pull-requests: write
     steps:
-      - uses: aws-github-ops/github-merit-badger@v0.0.98
+      - uses: aws-github-ops/github-merit-badger@949750c3f54985fad4715e77f88942be7547f1bc # v0.0.98
         id: merit-badger
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/publish-snapshots.yml b/.github/workflows/publish-snapshots.yml
index dc0ad97b..ee4f1ef3 100644
--- a/.github/workflows/publish-snapshots.yml
+++ b/.github/workflows/publish-snapshots.yml
@@ -15,14 +15,14 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - name: Set up JDK 21
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: 21
           distribution: temurin
       - name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # v4
         with:
           role-to-assume: ${{ secrets.PUBLISH_SNAPSHOTS_ROLE }}
           aws-region: us-east-1
diff --git a/.github/workflows/release-drafter.yml b/.github/workflows/release-drafter.yml
index 81cfb8ad..c106e37d 100644
--- a/.github/workflows/release-drafter.yml
+++ b/.github/workflows/release-drafter.yml
@@ -14,12 +14,12 @@ jobs:
       issues: write
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - id: get_data
         run: |
           echo "approvers=$(cat .github/CODEOWNERS | grep @ | tr -d '* ' | sed 's/@/,/g' | sed 's/,//1')" >> $GITHUB_OUTPUT
           echo "version=$(./gradlew getVersion  -Dbuild.snapshot=false -Dbuild -q | grep version= | cut -d'=' -f2)" >> $GITHUB_OUTPUT
-      - uses: trstringer/manual-approval@v1
+      - uses: trstringer/manual-approval@74d99dff7380e3e4b122d4ededcbca2b6ce59367 # v1
         with:
           secret: ${{ github.TOKEN }}
           approvers: ${{ steps.get_data.outputs.approvers }}
@@ -28,7 +28,7 @@ jobs:
           issue-body: "Please approve or deny the release of opensearch-sdk-java. **VERSION**: ${{ steps.get_data.outputs.version }} **TAG**: ${{ github.ref_name }}  **COMMIT**: ${{ github.sha }}"
           exclude-workflow-initiator-as-approver: true
       - name: Set up JDK 11
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@c1e323688fd81a25caa38c78aa6df2d33d3e20d9 # v4
         with:
           java-version: '11'
           distribution: 'temurin'
@@ -37,7 +37,7 @@ jobs:
         run: |
           ./gradlew --no-daemon -Dbuild.snapshot=false publishNebulaPublicationToLocalRepoRepository && tar -C build -cvf artifacts.tar.gz localRepo
       - name: Draft a release
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2
         with:
           draft: true
           generate_release_notes: true
diff --git a/.github/workflows/wrapper.yml b/.github/workflows/wrapper.yml
index 310d0ee4..ff8648a2 100644
--- a/.github/workflows/wrapper.yml
+++ b/.github/workflows/wrapper.yml
@@ -12,5 +12,5 @@ jobs:
     name: Validate
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: gradle/wrapper-validation-action@v3
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: gradle/wrapper-validation-action@f9c9c575b8b21b6485636a91ffecd10e558c62f6 # v3