diff --git a/.github/workflows/check-poetry-task.yml b/.github/workflows/check-poetry-task.yml
new file mode 100644
index 0000000..f963d61
--- /dev/null
+++ b/.github/workflows/check-poetry-task.yml
@@ -0,0 +1,109 @@
+name: Check Poetry
+
+on:
+  create:
+  push:
+    paths:
+      - ".github/workflows/check-poetry-task.ya?ml"
+      - "poetry.lock"
+      - "pyproject.toml"
+      - "Taskfile.ya?ml"
+  pull_request:
+    paths:
+      - ".github/workflows/check-poetry-task.ya?ml"
+      - "poetry.lock"
+      - "pyproject.toml"
+      - "Taskfile.ya?ml"
+  schedule:
+    # Run periodically to catch breakage caused by external changes.
+    - cron: "0 11 * * THU"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  run-determination:
+    runs-on: ubuntu-latest
+    permissions: {}
+    outputs:
+      result: ${{ steps.determination.outputs.result }}
+    steps:
+      - name: Determine if the rest of the workflow should run
+        id: determination
+        run: |
+          RELEASE_BRANCH_REGEX="^refs/heads/((v[0-9]+)|([0-9]+\.[0-9]+\.x))$"
+          # The `create` event trigger doesn't support `branches` filters, so it's necessary to use Bash instead.
+          if [[
+            "${{ github.event_name }}" != "create" ||
+            "${{ github.ref }}" =~ $RELEASE_BRANCH_REGEX
+          ]]; then
+            # Run the other jobs.
+            RESULT="true"
+          else
+            # There is no need to run the other jobs.
+            RESULT="false"
+          fi
+
+          echo "result=$RESULT" >> $GITHUB_OUTPUT
+
+  validate:
+    needs: run-determination
+    if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: pyproject.toml
+
+      - name: Install Task
+        uses: arduino/setup-task@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Validate pyproject.toml
+        run: |
+          task \
+            --silent \
+            poetry:validate
+
+  check-sync:
+    needs: run-determination
+    if: needs.run-determination.outputs.result == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Python
+        uses: actions/setup-python@v5
+        with:
+          python-version-file: pyproject.toml
+
+      - name: Install Task
+        uses: arduino/setup-task@v2
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Sync lockfile
+        run: |
+          task \
+            --silent \
+            poetry:sync
+
+      - name: Check if lockfile was out of sync
+        run: |
+          git diff \
+            --color \
+            --exit-code \
+            poetry.lock
diff --git a/README.md b/README.md
index 06bd938..733a26e 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,7 @@
 [![Check Prettier Formatting status](https://github.com/arduino/arduinoOTA/actions/workflows/check-prettier-formatting-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-prettier-formatting-task.yml)
 [![Spell Check status](https://github.com/arduino/arduinoOTA/actions/workflows/spell-check-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/spell-check-task.yml)
 [![Check Markdown status](https://github.com/arduino/arduinoOTA/actions/workflows/check-markdown-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-markdown-task.yml)
+[![Check Poetry status](https://github.com/arduino/arduinoOTA/actions/workflows/check-poetry-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-poetry-task.yml)
 [![Check Taskfiles status](https://github.com/arduino/arduinoOTA/actions/workflows/check-taskfiles.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-taskfiles.yml)
 [![Check Workflows status](https://github.com/arduino/arduinoOTA/actions/workflows/check-workflows-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-workflows-task.yml)
 [![Check YAML status](https://github.com/arduino/arduinoOTA/actions/workflows/check-yaml-task.yml/badge.svg)](https://github.com/arduino/arduinoOTA/actions/workflows/check-yaml-task.yml)
diff --git a/Taskfile.yml b/Taskfile.yml
index a214eee..882c68b 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -385,6 +385,24 @@ tasks:
         poetry install \
           {{if .POETRY_GROUPS}} --only {{.POETRY_GROUPS}} {{end}}
 
+  poetry:sync:
+    desc: Sync poetry.lock
+    deps:
+      - task: poetry:install
+    cmds:
+      - |
+        poetry lock \
+          --no-cache
+
+  poetry:validate:
+    desc: Validate pyproject.toml
+    deps:
+      - task: poetry:install
+    cmds:
+      - |
+        poetry check \
+          --lock
+
   # Make a temporary file named according to the passed TEMPLATE variable and print the path passed to stdout
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/windows-task/Taskfile.yml
   utility:mktemp-file: