diff --git a/.github/workflows/anchore.yml b/.github/workflows/anchore.yml
index 802f626..86bee0b 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@673cceb2b4886e2dfff697ab64a1ecd1c0a14a05 # v2
         if: always()
         with:
           sarif_file: results.sarif
diff --git a/.github/workflows/check_pr.yml b/.github/workflows/check_pr.yml
index 4ea9fe4..bb23884 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'
 
@@ -37,7 +37,7 @@ jobs:
     steps:
       - name: Verify PR Labels
         if: ${{ !contains(github.event.pull_request.labels.*.name, 'major') && !contains(github.event.pull_request.labels.*.name, 'minor') && !contains(github.event.pull_request.labels.*.name, 'patch') && !contains(github.event.pull_request.labels.*.name, 'patch') && !contains(github.event.pull_request.labels.*.name, 'skip') }}
-        uses: actions/github-script@v6.3.3
+        uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -68,12 +68,12 @@ 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 4778bf5..8e64a5b 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@v1.10.6
+        uses: pagopa/github-actions-template/maven-code-review@186af0dfc5ee51e6150046051d4e0b6444e15aed # v1.10.6
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           sonar_token: ${{ secrets.SONAR_TOKEN }}
@@ -90,7 +90,7 @@ 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/create_dashboard.yaml b/.github/workflows/create_dashboard.yaml
index 61fa251..9e9b4c2 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/gh-workflow-immortality.yml b/.github/workflows/gh-workflow-immortality.yml
index 3802db5..08161f5 100644
--- a/.github/workflows/gh-workflow-immortality.yml
+++ b/.github/workflows/gh-workflow-immortality.yml
@@ -15,6 +15,6 @@ jobs:
 
     steps:
       - name: Keep cronjob based triggers of GitHub workflows alive
-        uses: PhrozenByte/gh-workflow-immortality@v1
+        uses: PhrozenByte/gh-workflow-immortality@ed0af7d9884eb4cc5672940ae490a0111141fbac # v1
         with:
           secret: ${{ secrets.GH_WORKFLOW_IMMORTALITY }}
diff --git a/.github/workflows/gpd_get_fdr.yaml b/.github/workflows/gpd_get_fdr.yaml
index 579ab9c..54f1395 100644
--- a/.github/workflows/gpd_get_fdr.yaml
+++ b/.github/workflows/gpd_get_fdr.yaml
@@ -33,10 +33,10 @@ jobs:
 
     steps:
       - name: Check out the repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
         with:
           python-version: '3.12'
 
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 73332b7..1232ba9 100644
--- a/.github/workflows/release_deploy.yml
+++ b/.github/workflows/release_deploy.yml
@@ -110,7 +110,7 @@ jobs:
     steps:
       - name: Make Release
         id: release
-        uses: pagopa/github-actions-template/maven-release@v1.12.0
+        uses: pagopa/github-actions-template/maven-release@38203c7599bcac41a743237ccb17c733ff9c2eee # v1.12.0
         with:
           semver: ${{ needs.setup.outputs.semver }}
           github_token: ${{ secrets.BOT_TOKEN_GITHUB }}
@@ -126,7 +126,7 @@ 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 }}
@@ -148,7 +148,7 @@ 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/scheduled-maintenance-backoffice-pagopa-with-PA-to-betterstack.yml b/.github/workflows/scheduled-maintenance-backoffice-pagopa-with-PA-to-betterstack.yml
index 0d3e268..8a24bb0 100644
--- a/.github/workflows/scheduled-maintenance-backoffice-pagopa-with-PA-to-betterstack.yml
+++ b/.github/workflows/scheduled-maintenance-backoffice-pagopa-with-PA-to-betterstack.yml
@@ -13,11 +13,11 @@ jobs:
     steps:
     # Checkout del repository
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
     # Imposta Python
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
       with:
         python-version: '3.x'
 
diff --git a/.github/workflows/scheduled-maintenance_backoffice_pagopa_to_betterstack.yml b/.github/workflows/scheduled-maintenance_backoffice_pagopa_to_betterstack.yml
index 45ccdfa..656f5c8 100644
--- a/.github/workflows/scheduled-maintenance_backoffice_pagopa_to_betterstack.yml
+++ b/.github/workflows/scheduled-maintenance_backoffice_pagopa_to_betterstack.yml
@@ -13,11 +13,11 @@ jobs:
     steps:
     # Checkout del repository
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
     # Imposta Python
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
       with:
         python-version: '3.x'
 
diff --git a/.github/workflows/scheduled-opsgenie-incidents-to-statuspage.yml b/.github/workflows/scheduled-opsgenie-incidents-to-statuspage.yml
index 2cd574e..221769d 100644
--- a/.github/workflows/scheduled-opsgenie-incidents-to-statuspage.yml
+++ b/.github/workflows/scheduled-opsgenie-incidents-to-statuspage.yml
@@ -14,11 +14,11 @@ jobs:
     steps:
     # Checkout del repository
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
 
     # Imposta Python
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4
       with:
         python-version: '3.x'
 
diff --git a/Dockerfile b/Dockerfile
index 65e6a12..fe1cada 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,13 @@
 #
 # Build
 #
-FROM maven:3.8.4-jdk-11-slim as buildtime
+FROM maven:3.8.4-jdk-11-slim@sha256:04f8e5ba4a6a74fb7f97940bc75ac7340520728d2fb051ecc5c9ecbb9ba28b48 as buildtime
 WORKDIR /build
 COPY . .
 RUN mvn clean package
 
 
-FROM adoptopenjdk/openjdk11:alpine-jre as builder
+FROM adoptopenjdk/openjdk11:alpine-jre@sha256:3e81105664c1c9473c1a527a8d8f5da42f3791f80582b39f8db0072f8096b7ed as builder
 COPY --from=buildtime /build/target/*.jar application.jar
 RUN java -Djarmode=layertools -jar application.jar extract
 
diff --git a/performance-test/docker-compose.yaml b/performance-test/docker-compose.yaml
index e9205ff..ee60824 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:c362e72377bb63a897346d549b5ecc17bddd5ad5d3458c0307e03873ab2807c7
     container_name: k6
     volumes:
       - '${PWD}/src:/scripts'
@@ -15,7 +15,7 @@ services:
       - nginx
 
   nginx:
-    image: nginx
+    image: nginx@sha256:42e917aaa1b5bb40dd0f6f7f4f857490ac7747d7ef73b391c774a41a8b994f15
     container_name: nginx
     volumes:
       - '${PWD}/nginx/nginx.conf:/etc/nginx/nginx.conf'