diff --git a/.github/workflows/00_anchore.yml b/.github/workflows/00_anchore.yml
index c083a94..9280d64 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 --build-arg APP_NAME=fdr-technicalsupport --build-arg QUARKUS_PROFILE=prod
 
       - 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: false
           severity-cutoff: "high"
       - name: Upload Anchore Scan Report
-        uses: github/codeql-action/upload-sarif@v2
+        uses: github/codeql-action/upload-sarif@a073c66b2accf653a511d88537804dcafa07812e # 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 2ade37d..d67da1c 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, 'breaking-change') && !contains(github.event.pull_request.labels.*.name, 'new-release') && !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 c162f2e..e256116 100644
--- a/.github/workflows/03_code_review.yml
+++ b/.github/workflows/03_code_review.yml
@@ -30,7 +30,7 @@ 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 3bc03d1..ec17741 100644
--- a/.github/workflows/04_release_deploy.yml
+++ b/.github/workflows/04_release_deploy.yml
@@ -83,7 +83,7 @@ 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 }}
@@ -98,7 +98,7 @@ 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:
           branch: ${{ github.ref_name}}
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -125,7 +125,7 @@ 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/05_update_code.yml b/.github/workflows/05_update_code.yml
index a9730a3..e37be11 100644
--- a/.github/workflows/05_update_code.yml
+++ b/.github/workflows/05_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.API_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
 
@@ -43,7 +43,7 @@ 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 4b62991..e9a86cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ## Stage 1 : build with maven builder image with native capabilities
-FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17 AS build
+FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17@sha256:5264ebba03a176c3f69d33618a3e0cc268c0bb9c9fb01395c3dae406f0ea2820 AS build
 COPY --chown=quarkus:quarkus mvnw /code/mvnw
 COPY --chown=quarkus:quarkus .mvn /code/.mvn
 COPY --chown=quarkus:quarkus pom.xml /code/
@@ -12,7 +12,7 @@ ARG APP_NAME
 
 RUN ./mvnw package -DskipTests=true -Dquarkus.application.name=$APP_NAME -Dquarkus.profile=$QUARKUS_PROFILE
 
-FROM registry.access.redhat.com/ubi8/openjdk-17:1.14
+FROM registry.access.redhat.com/ubi8/openjdk-17:1.14@sha256:79585ca02551ecff9d368905d7ce387232b9fd328256e7a715ae3c4ec7b086d3
 
 ENV LANGUAGE='en_US:en'
 
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index f834154..17d5200 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3.8'
 
 services:
   elasticsearch:
-    image: docker.elastic.co/elasticsearch/elasticsearch:8.6.2
+    image: docker.elastic.co/elasticsearch/elasticsearch:8.6.2@sha256:1c53c89d04f207beb99d56cc4a1cc23516bd9c386858843d5082a98257c04d1c
     ports:
       - "9200:9200"
       - "9300:9300"
@@ -15,7 +15,7 @@ services:
       - infra
 
   kibana:
-    image: docker.elastic.co/kibana/kibana:8.6.2
+    image: docker.elastic.co/kibana/kibana:8.6.2@sha256:7157c399f97acddf3297501d5af66097d57be67d27d62f810bcbdd11785a39b8
     ports:
       - "5601:5601"
     networks:
@@ -25,7 +25,7 @@ services:
 
   alertmanager:
     hostname: alertmanager
-    image: prom/alertmanager
+    image: prom/alertmanager@sha256:e13b6ed5cb929eeaee733479dce55e10eb3bc2e9c4586c705a4e8da41e5eacf5
     volumes:
       - ${PWD}/alertmanager/alertmanager.conf:/etc/alertmanager/alertmanager.conf
     command:
@@ -37,7 +37,7 @@ services:
 
   prometheus:
     hostname: prometheus
-    image: prom/prometheus
+    image: prom/prometheus@sha256:075b1ba2c4ebb04bc3a6ab86c06ec8d8099f8fda1c96ef6d104d9bb1def1d8bc
     volumes:
       - ${PWD}/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
       - ${PWD}/prometheus/alert_rules.yml:/etc/prometheus/alert_rules.yml
@@ -53,7 +53,7 @@ services:
 
   grafana:
     hostname: grafana
-    image: grafana/grafana
+    image: grafana/grafana@sha256:0dc5a246ab16bb2c38a349fb588174e832b4c6c2db0981d0c3e6cd774ba66a54
     volumes:
       - ${PWD}/grafana/grafana_datasources.yml:/etc/grafana/provisioning/datasources/all.yaml
       - ${PWD}/grafana/grafana_config.ini:/etc/grafana/config.ini
@@ -64,7 +64,7 @@ services:
       - infra
 
   jaeger-all-in-one:
-    image: jaegertracing/all-in-one:latest
+    image: jaegertracing/all-in-one:latest@sha256:38f5cc402e92a8bef212536739e8041aa5dd5e2f0b78a042504ac20fb84bffa7
     ports:
       - "16686:16686"
       - "14268:14268"
@@ -73,7 +73,7 @@ services:
       - infra
 
   otel-collector:
-    image: otel/opentelemetry-collector:latest
+    image: otel/opentelemetry-collector:latest@sha256:98d9c328b421a07784a6d7c8303dda77396564e31cb92c262308b66417fa4144
     command: [ "--config=/etc/otel-collector-config.yaml" ]
     volumes:
       - ${PWD}/otel-collector/otel-collector-config.yaml:/etc/otel-collector-config.yaml:Z
diff --git a/src/main/docker/Dockerfile.jvm b/src/main/docker/Dockerfile.jvm
index ad219b9..e00e720 100644
--- a/src/main/docker/Dockerfile.jvm
+++ b/src/main/docker/Dockerfile.jvm
@@ -75,7 +75,7 @@
 #   accessed directly. (example: "foo.example.com,bar.example.com")
 #
 ###
-FROM registry.access.redhat.com/ubi8/openjdk-17:1.14
+FROM registry.access.redhat.com/ubi8/openjdk-17:1.14@sha256:79585ca02551ecff9d368905d7ce387232b9fd328256e7a715ae3c4ec7b086d3
 
 ENV LANGUAGE='en_US:en'
 
diff --git a/src/main/docker/Dockerfile.legacy-jar b/src/main/docker/Dockerfile.legacy-jar
index f801461..a0314be 100644
--- a/src/main/docker/Dockerfile.legacy-jar
+++ b/src/main/docker/Dockerfile.legacy-jar
@@ -75,7 +75,7 @@
 #   accessed directly. (example: "foo.example.com,bar.example.com")
 #
 ###
-FROM registry.access.redhat.com/ubi8/openjdk-17:1.14
+FROM registry.access.redhat.com/ubi8/openjdk-17:1.14@sha256:79585ca02551ecff9d368905d7ce387232b9fd328256e7a715ae3c4ec7b086d3
 
 ENV LANGUAGE='en_US:en'
 
diff --git a/src/main/docker/Dockerfile.multistage b/src/main/docker/Dockerfile.multistage
index 7944201..b108d8a 100644
--- a/src/main/docker/Dockerfile.multistage
+++ b/src/main/docker/Dockerfile.multistage
@@ -1,5 +1,5 @@
 ## Stage 1 : build with maven builder image with native capabilities
-FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17 AS build
+FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17@sha256:5264ebba03a176c3f69d33618a3e0cc268c0bb9c9fb01395c3dae406f0ea2820 AS build
 COPY --chown=quarkus:quarkus mvnw /code/mvnw
 COPY --chown=quarkus:quarkus .mvn /code/.mvn
 COPY --chown=quarkus:quarkus pom.xml /code/
@@ -12,7 +12,7 @@ ARG APP_NAME
 RUN ./mvnw package -Pnative -Dquarkus.application.name=$APP_NAME -Dquarkus.profile=$QUARKUS_PROFILE
 
 ## Stage 2 : create the docker final image
-FROM quay.io/quarkus/quarkus-micro-image:2.0
+FROM quay.io/quarkus/quarkus-micro-image:2.0@sha256:e22c90b4f4d0810130a3d167fd659c750d32ebe9baad1d144399d60bb9683ce4
 WORKDIR /work/
 COPY --from=build /code/target/*-runner /work/application
 
diff --git a/src/main/docker/Dockerfile.multistage.jvm b/src/main/docker/Dockerfile.multistage.jvm
index c627c29..e49c75a 100644
--- a/src/main/docker/Dockerfile.multistage.jvm
+++ b/src/main/docker/Dockerfile.multistage.jvm
@@ -1,5 +1,5 @@
 ## Stage 1 : build with maven builder image with native capabilities
-FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17 AS build
+FROM quay.io/quarkus/ubi-quarkus-graalvmce-builder-image:22.3-java17@sha256:5264ebba03a176c3f69d33618a3e0cc268c0bb9c9fb01395c3dae406f0ea2820 AS build
 COPY --chown=quarkus:quarkus mvnw /code/mvnw
 COPY --chown=quarkus:quarkus .mvn /code/.mvn
 COPY --chown=quarkus:quarkus pom.xml /code/
@@ -12,7 +12,7 @@ ARG APP_NAME
 
 RUN ./mvnw package -DskipTests=true -Dquarkus.application.name=$APP_NAME -Dquarkus.profile=$QUARKUS_PROFILE
 
-FROM registry.access.redhat.com/ubi8/openjdk-17:1.14
+FROM registry.access.redhat.com/ubi8/openjdk-17:1.14@sha256:79585ca02551ecff9d368905d7ce387232b9fd328256e7a715ae3c4ec7b086d3
 
 ENV LANGUAGE='en_US:en'
 
diff --git a/src/main/docker/Dockerfile.native b/src/main/docker/Dockerfile.native
index 4e076cf..cbd54f5 100644
--- a/src/main/docker/Dockerfile.native
+++ b/src/main/docker/Dockerfile.native
@@ -14,7 +14,7 @@
 # docker run -i --rm -p 8080:8080 quarkus/code-with-quarkus
 #
 ###
-FROM registry.access.redhat.com/ubi8/ubi-minimal:8.6
+FROM registry.access.redhat.com/ubi8/ubi-minimal:8.6@sha256:33931dce809712888d1a8061bfa676963f517daca993984afed3251bc1fb5987
 WORKDIR /work/
 RUN chown 1001 /work \
     && chmod "g+rwX" /work \
diff --git a/src/main/docker/Dockerfile.native-micro b/src/main/docker/Dockerfile.native-micro
index 40afb1a..a85997e 100644
--- a/src/main/docker/Dockerfile.native-micro
+++ b/src/main/docker/Dockerfile.native-micro
@@ -17,7 +17,7 @@
 # docker run -i --rm -p 8080:8080 quarkus/code-with-quarkus
 #
 ###
-FROM quay.io/quarkus/quarkus-micro-image:2.0
+FROM quay.io/quarkus/quarkus-micro-image:2.0@sha256:e22c90b4f4d0810130a3d167fd659c750d32ebe9baad1d144399d60bb9683ce4
 WORKDIR /work/
 RUN chown 1001 /work \
     && chmod "g+rwX" /work \