diff --git a/.github/workflows/00_anchore.yml b/.github/workflows/00_anchore.yml
index 802f626..5be96ac 100644
--- a/.github/workflows/00_anchore.yml
+++ b/.github/workflows/00_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@430e27ef200cf61455a15dd5b56e130c8227a563 # v2
         if: always()
         with:
           sarif_file: results.sarif
diff --git a/.github/workflows/01_add_patch_label.yml b/.github/workflows/01_add_patch_label.yml
index 00e0fc5..c0002b9 100644
--- a/.github/workflows/01_add_patch_label.yml
+++ b/.github/workflows/01_add_patch_label.yml
@@ -19,7 +19,7 @@ jobs:
     steps:
       - name: Check user labels
         id: check_user_labels
-        uses: actions/github-script@v6.3.3
+        uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -48,7 +48,7 @@ jobs:
 
       - name: Add comment
         if: ${{ steps.check_user_labels.outputs.result == 'true' }}
-        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/.github/workflows/01_assignee.yml b/.github/workflows/01_assignee.yml
index 0611917..cf22668 100644
--- a/.github/workflows/01_assignee.yml
+++ b/.github/workflows/01_assignee.yml
@@ -21,6 +21,6 @@ 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'
diff --git a/.github/workflows/02_check_pr.yml b/.github/workflows/02_check_pr.yml
index 8dc9b00..407d3e5 100644
--- a/.github/workflows/02_check_pr.yml
+++ b/.github/workflows/02_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, 'patch') && !contains(github.event.pull_request.labels.*.name, 'ignore-for-release') }}
-        uses: actions/github-script@v6.3.3
+        uses: actions/github-script@d556feaca394842dc55e4734bf3bb9f685482fa0 # v6.3.3
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
@@ -70,7 +70,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - name: Formatting
         id: format
         continue-on-error: true
@@ -78,7 +78,7 @@ jobs:
         with:
           args: "--set-exit-if-changed"
 
-      - 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 }}
diff --git a/.github/workflows/03_code_review.yml b/.github/workflows/03_code_review.yml
index 6a8f893..fae6494 100644
--- a/.github/workflows/03_code_review.yml
+++ b/.github/workflows/03_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@v1.8.3
+        uses: pagopa/github-actions-template/maven-code-review@de4ca1ddefb1461c176cc42259e494158b578fe3 # v1.8.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           sonar_token: ${{ secrets.SONAR_TOKEN }}
diff --git a/.github/workflows/04_release_deploy.yml b/.github/workflows/04_release_deploy.yml
index 4e27974..c0300fc 100644
--- a/.github/workflows/04_release_deploy.yml
+++ b/.github/workflows/04_release_deploy.yml
@@ -81,7 +81,7 @@ jobs:
     steps:
       - name: Make Release
         id: release
-        uses: pagopa/github-actions-template/maven-release@v1.5.4
+        uses: pagopa/github-actions-template/maven-release@d91a1fd0b913c9830589be5d86cdb71c90813fae # v1.5.4
         with:
           semver: ${{ needs.setup.outputs.semver }}
           github_token: ${{ secrets.BOT_TOKEN_GITHUB }}
@@ -102,12 +102,12 @@ jobs:
 #          github_token: ${{ secrets.GITHUB_TOKEN }}
 #          tag: ${{ needs.release.outputs.version }}
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
         with:
           ref: ${{ github.ref_name }}
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        uses: docker/login-action@465a07811f14bebb1938fbed4728c6a1ff8901fc # v2
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
@@ -115,7 +115,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v4.3.0
+        uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v4.3.0
         with:
           images: ghcr.io/${{ github.repository }}
           tags: |
@@ -125,7 +125,7 @@ jobs:
             type=sha
 
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@0a97817b6ade9f46837855d676c4cca3a2471fc9 # v4
         with:
           context: .
           push: true
@@ -155,7 +155,7 @@ jobs:
     steps:
       - name: Report Status
         if: always()
-        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/Dockerfile b/Dockerfile
index 512a959..057784e 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 -DskipTests
 
 
-FROM adoptopenjdk/openjdk11:alpine-jre as builder
+FROM adoptopenjdk/openjdk11:alpine-jre@sha256:1f1b0fd0d2d7af2cbffb08286a8216ff058bbf5af49d271e53a5485b29513dba 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..3b62b31 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:d39047ea6c5981ac0abacec2ea32389f22a7aa68bc8902c08b356cc5dd74aac9
     container_name: k6
     volumes:
       - '${PWD}/src:/scripts'
@@ -15,7 +15,7 @@ services:
       - nginx
 
   nginx:
-    image: nginx
+    image: nginx@sha256:d2eb56950b84efe34f966a2b92efb1a1a2ea53e7e93b94cdf45a27cf3cd47fc0
     container_name: nginx
     volumes:
       - '${PWD}/nginx/nginx.conf:/etc/nginx/nginx.conf'