diff --git a/.github/workflows/anchore.yml b/.github/workflows/anchore.yml
index 802f626..712e4e9 100644
--- a/.github/workflows/anchore.yml
+++ b/.github/workflows/anchore.yml
@@ -35,20 +35,20 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout the code
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
       - name: Build the Docker image
         run: docker build . --file ${{ env.DOCKERFILE }} --tag localbuild/testimage:latest
 
       - name: Run the Anchore scan action itself with GitHub Advanced Security code scanning integration enabled
-        uses: anchore/scan-action@v3
+        uses: anchore/scan-action@3343887d815d7b07465f6fdcd395bd66508d486a # v3
         with:
           image: "localbuild/testimage:latest"
           acs-report-enable: true
           fail-build: true
           severity-cutoff: "high"
       - name: Upload Anchore Scan Report
-        uses: github/codeql-action/upload-sarif@v2
+        uses: github/codeql-action/upload-sarif@b9bbe2d60639154188464569b9ad28bdf33eab91 # v2
         if: always()
         with:
           sarif_file: results.sarif
diff --git a/.github/workflows/check_pr.yml b/.github/workflows/check_pr.yml
index ef49616..1a7fdb4 100644
--- a/.github/workflows/check_pr.yml
+++ b/.github/workflows/check_pr.yml
@@ -24,7 +24,7 @@ jobs:
     steps:
       - name: Assign Me
         # You may pin to the exact commit or the version.
-        uses: kentaro-m/auto-assign-action@v1.2.1
+        uses: kentaro-m/auto-assign-action@746a3a558fdd0e061f612ec9f8ff1b8a19c1a115 # v1.2.1
         with:
           configuration-path: '.github/auto_assign.yml'
 
@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
       - name: Formatting
         id: format
@@ -43,7 +43,7 @@ jobs:
           path: .
           fail-on-changes: false
 
-      - uses: actions/github-script@v6.3.3
+      - uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         if: steps.format.outcome != 'success'
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
@@ -77,12 +77,12 @@ jobs:
     runs-on: ubuntu-latest
     name: Check Size
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
         with:
           fetch-depth: 0
 
       - name: Check Size
-        uses: actions/github-script@v6.3.3
+        uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         env:
           IGNORED_FILES: openapi.json, api-docs.json
           BRANCH_NAME: ${{ github.head_ref}}
diff --git a/.github/workflows/code_review.yml b/.github/workflows/code_review.yml
index 8f157da..cd8c7c8 100644
--- a/.github/workflows/code_review.yml
+++ b/.github/workflows/code_review.yml
@@ -35,7 +35,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       - name: Code Review
-        uses: pagopa/github-actions-template/maven-code-review@v1.10.4
+        uses: pagopa/github-actions-template/maven-code-review@5a544cfcc87edacde3391e4fb70228194f90ec63 # v1.10.4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           sonar_token: ${{ secrets.SONAR_TOKEN }}
diff --git a/.github/workflows/create_dashboard.yaml b/.github/workflows/create_dashboard.yaml
index 6fd77ed..9506c47 100644
--- a/.github/workflows/create_dashboard.yaml
+++ b/.github/workflows/create_dashboard.yaml
@@ -38,7 +38,7 @@ jobs:
           persist-credentials: false
 
       # from https://github.com/pagopa/opex-dashboard-azure-action/
-      - uses: pagopa/opex-dashboard-azure-action@v1.1.2
+      - uses: pagopa/opex-dashboard-azure-action@ece3bc2b133be74cabb50aec14cdb9b8051b886f # v1.1.2
         with:
           environment: ${{ matrix.environment }}
           api-name:
@@ -55,7 +55,7 @@ jobs:
     if: ${{ always() }}
     steps:
       - name: Delete Previous deployments
-        uses: actions/github-script@v6
+        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6
         env:
           SHA_HEAD: ${{ (github.event_name == 'pull_request' && github.event.pull_request.head.sha) || github.sha}}
         with:
diff --git a/.github/workflows/integration_test.yml b/.github/workflows/integration_test.yml
index c405e3e..002e641 100644
--- a/.github/workflows/integration_test.yml
+++ b/.github/workflows/integration_test.yml
@@ -70,7 +70,7 @@ jobs:
     steps:
       - name: Report Status
         if: ${{ inputs.notify }}
-        uses: ravsamhq/notify-slack-action@v2
+        uses: ravsamhq/notify-slack-action@be814b201e233b2dc673608aa46e5447c8ab13f2 # v2
         with:
           status: ${{ needs.integration_test.result }}
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -87,7 +87,7 @@ jobs:
     if: ${{ always() }}
     steps:
       - name: Delete Previous deployments
-        uses: actions/github-script@v6
+        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6
         env:
           SHA_HEAD: ${{ (github.event_name == 'pull_request' && github.event.pull_request.head.sha) || github.sha}}
         with:
diff --git a/.github/workflows/release_deploy.yml b/.github/workflows/release_deploy.yml
index fb5368a..4d1fa4c 100644
--- a/.github/workflows/release_deploy.yml
+++ b/.github/workflows/release_deploy.yml
@@ -99,7 +99,7 @@ jobs:
     steps:
       - name: Make Release
         id: release
-        uses: pagopa/github-actions-template/maven-release@v1.6.8
+        uses: pagopa/github-actions-template/maven-release@bbfcb8de250021201b77b8b7b3525e552d79b36d # v1.6.8
         with:
           semver: ${{ needs.setup.outputs.semver }}
           github_token: ${{ secrets.BOT_TOKEN_GITHUB }}
@@ -114,7 +114,7 @@ jobs:
     steps:
       - name: Build and Push
         id: semver
-        uses: pagopa/github-actions-template/ghcr-build-push@v1.5.4
+        uses: pagopa/github-actions-template/ghcr-build-push@d91a1fd0b913c9830589be5d86cdb71c90813fae # v1.5.4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           tag: ${{ needs.release.outputs.version }}
@@ -137,7 +137,7 @@ jobs:
     steps:
       - name: Report Status
         if: ${{ needs.setup.outputs.environment == 'prod' }}
-        uses: ravsamhq/notify-slack-action@v2
+        uses: ravsamhq/notify-slack-action@be814b201e233b2dc673608aa46e5447c8ab13f2 # v2
         with:
           status: ${{ needs.deploy_aks.result }}
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/update_code.yml b/.github/workflows/update_code.yml
index ed41d83..8b42a43 100644
--- a/.github/workflows/update_code.yml
+++ b/.github/workflows/update_code.yml
@@ -17,7 +17,7 @@ jobs:
     if: ${{ contains(github.event.comment.body, 'update_code') }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
         with:
           token: ${{ secrets.BOT_TOKEN_GITHUB }}
 
@@ -26,7 +26,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Set up JDK 11
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@b6e674f4b717d7b0ae3baee0fbe79f498905dfde # v1
         with:
           java-version: 11
 
@@ -58,7 +58,7 @@ jobs:
     if: ${{ always() && contains(needs.*.result, 'failure') }}
     steps:
       - name: Notify if Failure
-        uses: actions/github-script@v6.3.3
+        uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
diff --git a/performance-test/docker-compose.yaml b/performance-test/docker-compose.yaml
index e9205ff..e8b60b4 100644
--- a/performance-test/docker-compose.yaml
+++ b/performance-test/docker-compose.yaml
@@ -1,7 +1,7 @@
 version: '3.3'
 services:
   k6:
-    image: grafana/k6
+    image: grafana/k6@sha256:278d78f2953041b6b4b0bd315e8605ed43222245771adc405f3252f3edea0eef
     container_name: k6
     volumes:
       - '${PWD}/src:/scripts'
@@ -15,7 +15,7 @@ services:
       - nginx
 
   nginx:
-    image: nginx
+    image: nginx@sha256:0f04e4f646a3f14bf31d8bc8d885b6c951fdcf42589d06845f64d18aec6a3c4d
     container_name: nginx
     volumes:
       - '${PWD}/nginx/nginx.conf:/etc/nginx/nginx.conf'