diff --git a/.github/workflows/continuous-integration.yaml b/.github/workflows/continuous-integration.yaml
index de6d7fd54..30f6e6cc7 100644
--- a/.github/workflows/continuous-integration.yaml
+++ b/.github/workflows/continuous-integration.yaml
@@ -78,12 +78,14 @@ jobs:
           echo "Changed files:"
           echo "${ALL_CHANGED_FILES}"
 
-          echo "::set-output name=all::${ALL_CHANGED_FILES}"
+          echo "::set-output name=all::${ALL_CHANGED_FILES//$'\n'/ }"
 
       - name: Should rebuild docker check
         run: |
           set +e
-          echo "${{ steps.files.outputs.all }}" | grep "${ENV_DOCKERFILE}$"
+          ALL_CHANGED_FILES="${{ steps.files.outputs.all }}"
+          ALL_CHANGED_FILES="${ALL_CHANGED_FILES// /$'\n'}"
+          echo "${ALL_CHANGED_FILES}" | grep "${ENV_DOCKERFILE}$"
           DOCKERFILE_CHANGED=$?
           if [[ "${DOCKERFILE_CHANGED}" == "0" || "${FORCE_REBUILD_DOCKER}" == "true" ]]; then
             echo "Should rebuild docker image!"
diff --git a/.github/workflows/package-watcher.yaml b/.github/workflows/package-watcher.yaml
new file mode 100644
index 000000000..2e5ae5855
--- /dev/null
+++ b/.github/workflows/package-watcher.yaml
@@ -0,0 +1,83 @@
+name: Package Version Checker
+
+on:
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    # At minute 0 for each hour from 8:00 to 22:00 inclusive from Monday to Friday inclusive
+    # Timezone is UTC, so Paris time is +2 during the summer and +1 during winter
+    - cron: '0 6-20 * * 1-5'
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+env:
+  ACTION_RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+
+jobs:
+  check_and_notify_build:
+    name: Check timestamps and open PR
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Should run
+        run: |
+          SHOULD_RUN=${{ secrets.PACKAGE_WATCHER_ENABLED }}
+          if [[ "${SHOULD_RUN}" == "PACKAGE_WATCHER_PREFIX_ENABLED" ]]; then
+            SHOULD_RUN="true"
+            echo "Running package watcher"
+          else
+            SHOULD_RUN="false"
+            echo "Won't run package watcher"
+          fi
+          echo "SHOULD_RUN=${SHOULD_RUN}" >> "$GITHUB_ENV"
+      - name: Checkout Code
+        if: ${{ fromJSON(env.SHOULD_RUN) }}
+        uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
+      - name: Compare image timestamps and notify
+        if: ${{ fromJSON(env.SHOULD_RUN) }}
+        env:
+          WHEEL: concretefhe_compiler-0.1.0-cp38-cp38-manylinux_2_24_x86_64.whl
+        run: |
+          ./script/actions_utils/timestamp_check_compiler_package_update_container.sh \
+          --compiler-release-endpoint-url \
+          https://api.github.com/repos/zama-ai/homomorphizer/releases \
+          --env_img_url \
+          https://api.github.com/orgs/zama-ai/packages/container/concretefhe-env/versions \
+          --file "${WHEEL}" \
+          --token ${{ secrets.BOT_TOKEN }} \
+          --github-env "$GITHUB_ENV"
+      - name: Open PR
+        if: ${{ fromJSON(env.SHOULD_RUN) && env.LATEST_COMPILER_PACKAGE_TIMESTAMP != '' }}
+        uses: peter-evans/create-pull-request@67df31e08a133c6a77008b89689677067fef169e
+        id: cpr
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          commit-message: "chore(deps): bump compiler to ${{ env.LATEST_COMPILER_PACKAGE_TIMESTAMP }}"
+          branch: chore/update-docker-env-compiler
+          base: main
+          title: "Docker env compiler update to ${{ env.LATEST_COMPILER_PACKAGE_TIMESTAMP }}"
+          body: "Automatic PR for docker env compiler update"
+          labels: dependencies
+      - name: Self approve PR to attempt auto merge
+        if: ${{ fromJSON(env.SHOULD_RUN) && env.LATEST_COMPILER_PACKAGE_TIMESTAMP != '' }}
+        uses: hmarr/auto-approve-action@5d04a5ca6da9aeb8ca9f31a5239b96fc3e003029
+        with:
+          github-token: ${{ secrets.BOT_TOKEN }}
+          pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}
+      - name: Enable auto-merge for PR
+        if: ${{ fromJSON(env.SHOULD_RUN) && env.LATEST_COMPILER_PACKAGE_TIMESTAMP != '' }}
+        uses: peter-evans/enable-pull-request-automerge@d2ede5636b3febc92809259995e643565e675aab
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}
+      - name: Send Slack Notification
+        if: ${{ always() && failure() }}
+        continue-on-error: true
+        uses: rtCamp/action-slack-notify@12e36fc18b0689399306c2e0b3e0f2978b7f1ee7
+        env:
+          SLACK_CHANNEL: ${{ secrets.SLACK_CHANNEL }}
+          SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
+          SLACK_COLOR: ${{ job.status }}
+          SLACK_MESSAGE: "Package watcher finished with status ${{ job.status }} \
+            (${{ env.ACTION_RUN_URL }})"
+          SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
+          SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
diff --git a/docker/Dockerfile.concretefhe-env b/docker/Dockerfile.concretefhe-env
index d93e01207..bbce6cdce 100644
--- a/docker/Dockerfile.concretefhe-env
+++ b/docker/Dockerfile.concretefhe-env
@@ -1,5 +1,8 @@
 FROM ubuntu:20.04
 
+# Do not change the line below it will be updated automatically when the docker is regenerated
+# compiler timestamp: unknown
+
 # Remove once compiler is on PyPi https://github.com/zama-ai/concretefhe-internal/issues/809
 ARG WHEEL
 ENV TZ=Europe/Paris
diff --git a/script/actions_utils/timestamp_check_compiler_package_update_container.sh b/script/actions_utils/timestamp_check_compiler_package_update_container.sh
new file mode 100755
index 000000000..35d0570c4
--- /dev/null
+++ b/script/actions_utils/timestamp_check_compiler_package_update_container.sh
@@ -0,0 +1,93 @@
+#!/bin/bash -e
+
+set -e
+
+FILE=
+COMPILER_RELEASE_ENDPOINT_URL=
+ENV_IMG_ENDPOINT_URL=
+TOKEN=
+ENV_DOCKERFILE=./docker/Dockerfile.concretefhe-env
+GITHUB_ENV_FILE=debug.txt
+
+while [ -n "$1" ]
+do
+   case "$1" in
+        "--file" )
+          shift
+          FILE="$1"
+          ;;
+
+        "--compiler-release-endpoint-url" )
+            shift
+            COMPILER_RELEASE_ENDPOINT_URL="$1"
+            ;;
+
+        "--env_img_url" )
+            shift
+            ENV_IMG_ENDPOINT_URL="$1"
+            ;;
+
+        "--token" )
+            shift
+            TOKEN="$1"
+            ;;
+
+        "--github-env")
+            shift
+            GITHUB_ENV_FILE="$1"
+            ;;
+
+        *)
+            echo "Unknown param : $1"
+            exit 1
+            ;;
+   esac
+   shift
+done
+
+ENV_JSON=$(curl \
+-X GET \
+-H "Accept: application/vnd.github.v3+json" \
+-H "Authorization: token ${TOKEN}" \
+"${ENV_IMG_ENDPOINT_URL}")
+
+LATEST_ENV_IMG_JSON=$(echo "${ENV_JSON}" | \
+jq -rc '.[] | select(.metadata.container.tags[] | contains("latest"))')
+
+RELEASE_JSON=$(curl -H "Authorization: token ${TOKEN}" \
+-H "Accept: application/vnd.github.v3.raw" \
+"${COMPILER_RELEASE_ENDPOINT_URL}" | jq '.[0]')
+
+echo "Release json:"
+echo "${RELEASE_JSON}"
+
+ASSET_JSON=$(echo "${RELEASE_JSON}" | jq ".assets | map(select(.name | contains(\"${FILE}\")))[0]")
+
+echo "Asset json:"
+echo "${ASSET_JSON}"
+
+LATEST_ENV_IMG_TIMESTAMP=$(echo "${LATEST_ENV_IMG_JSON}" | jq -r '.updated_at')
+LATEST_COMPILER_PACKAGE_TIMESTAMP=$(echo "${ASSET_JSON}" | jq -r '.updated_at')
+
+echo "Latest env image timestamp: ${LATEST_ENV_IMG_TIMESTAMP}"
+echo "Latest compiler package timestamp: ${LATEST_COMPILER_PACKAGE_TIMESTAMP}"
+
+LATEST_ENV_IMG_EPOCH=$(date -d "${LATEST_ENV_IMG_TIMESTAMP}" +%s)
+LATEST_COMPILER_PACKAGE_EPOCH=$(date -d "${LATEST_COMPILER_PACKAGE_TIMESTAMP}" +%s)
+
+echo "Latest env image epoch: ${LATEST_ENV_IMG_EPOCH}"
+echo "Latest compiler package epoch: ${LATEST_COMPILER_PACKAGE_EPOCH}"
+
+if [[ "${LATEST_COMPILER_PACKAGE_EPOCH}" -gt "${LATEST_ENV_IMG_EPOCH}" ]]; then
+    echo "Env image out of date, sending rebuild request."
+    TMP_DOCKER_FILE="$(mktemp)"
+    sed "s/\(# compiler timestamp: \)\(.*\)/\1${LATEST_COMPILER_PACKAGE_TIMESTAMP}/g" \
+        "${ENV_DOCKERFILE}" > "${TMP_DOCKER_FILE}"
+    cp -f "${TMP_DOCKER_FILE}" "${ENV_DOCKERFILE}"
+    rm -f "${TMP_DOCKER_FILE}"
+    echo "LATEST_COMPILER_PACKAGE_TIMESTAMP=${LATEST_COMPILER_PACKAGE_TIMESTAMP}" \
+    >> "${GITHUB_ENV_FILE}"
+    echo "New package timestamp: ${LATEST_COMPILER_PACKAGE_TIMESTAMP}"
+else
+    echo "Image up to date, nothing to do."
+fi