diff --git a/.github/actions/smoke-docker-image/action.yml b/.github/actions/smoke-docker-image/action.yml
new file mode 100644
index 000000000..843b11260
--- /dev/null
+++ b/.github/actions/smoke-docker-image/action.yml
@@ -0,0 +1,34 @@
+name: Smoke test Docker image
+description: Generate a small model with a datamodel-code-generator Docker image.
+
+inputs:
+  image:
+    description: Docker image tag to smoke test.
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Generate and validate model
+      shell: bash
+      env:
+        SMOKE_IMAGE: ${{ inputs.image }}
+        SMOKE_WORKSPACE: ${{ github.workspace }}
+      run: |
+        set -euo pipefail
+
+        output="$(
+          docker run --rm \
+            --volume "$SMOKE_WORKSPACE/tests/data/jsonschema:/data:ro" \
+            "$SMOKE_IMAGE" \
+            --input /data/simple_string.json \
+            --input-file-type jsonschema \
+            --disable-timestamp
+        )"
+
+        printf '%s\n' "$output" | grep -Fqx "class Model(BaseModel):"
+        printf '%s\n' "$output" | grep -Fqx "    s: str"
+        if printf '%s\n' "$output" | grep -Fq "timestamp:"; then
+          echo "generated output contains a timestamp" >&2
+          exit 1
+        fi
diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
index 5c173ef3e..8207252bb 100644
--- a/.github/dependabot.yaml
+++ b/.github/dependabot.yaml
@@ -22,3 +22,11 @@ updates:
     github-actions:
       patterns:
       - "*"
+- package-ecosystem: docker
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: thursday
+    time: "10:45"
+    timezone: Asia/Tokyo
+  open-pull-requests-limit: 5
diff --git a/.github/workflows/docker.yaml b/.github/workflows/docker.yaml
new file mode 100644
index 000000000..4f77376ba
--- /dev/null
+++ b/.github/workflows/docker.yaml
@@ -0,0 +1,58 @@
+name: Docker
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - Dockerfile
+      - .github/actions/smoke-docker-image/action.yml
+      - .github/workflows/docker.yaml
+      - .github/workflows/publish.yaml
+  pull_request:
+    branches: [main]
+    paths:
+      - Dockerfile
+      - .github/actions/smoke-docker-image/action.yml
+      - .github/workflows/docker.yaml
+      - .github/workflows/publish.yaml
+  workflow_dispatch:
+
+concurrency:
+  group: docker-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  smoke:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          fetch-depth: 1
+          persist-credentials: false
+      - name: Resolve latest release version
+        id: release
+        run: |
+          set -euo pipefail
+          version="$(
+            curl -fsSL https://pypi.org/pypi/datamodel-code-generator/json \
+              | python3 -c 'import json, sys; print(json.load(sys.stdin)["info"]["version"])'
+          )"
+          echo "version=$version" >> "$GITHUB_OUTPUT"
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
+      - name: Build Docker image
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
+        with:
+          context: .
+          load: true
+          tags: datamodel-code-generator:smoke
+          build-args: |
+            VERSION=${{ steps.release.outputs.version }}
+      - name: Smoke test Docker image
+        uses: ./.github/actions/smoke-docker-image
+        with:
+          image: datamodel-code-generator:smoke
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index c0fb7fb13..c3a449d3d 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -20,6 +20,8 @@ jobs:
           persist-credentials: false
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0
+        with:
+          enable-cache: false
       - name: Build package
         run: uv build --python 3.13 --python-preference only-managed --sdist --wheel . --out-dir dist
       - name: Store the distribution packages
@@ -77,6 +79,18 @@ jobs:
         uses: docker/setup-qemu-action@06116385d9baf250c9f4dcb4858b16962ea869c3 # v4.1.0
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
+      - name: Build Docker image for smoke test
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
+        with:
+          context: .
+          load: true
+          tags: datamodel-code-generator:smoke
+          build-args: |
+            VERSION=${{ github.ref_name }}
+      - name: Smoke test Docker image
+        uses: ./.github/actions/smoke-docker-image
+        with:
+          image: datamodel-code-generator:smoke
       - name: Build and push
         uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
diff --git a/Dockerfile b/Dockerfile
index 80f7ff7ab..76ae93250 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,27 @@
-FROM python:3.12.0-alpine3.17 as builder
+FROM python:3.14.2-slim-bookworm AS builder
+
+ARG VERSION
+
+ENV VIRTUAL_ENV=/opt/datamodel-code-generator
+ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
 
 LABEL maintainer="Koudai Aono <koxudaxi@gmail.com>"
 
-RUN apk add --no-cache gcc musl-dev
+RUN test -n "${VERSION}" \
+    || { echo "The VERSION build arg is required." >&2; exit 1; } \
+    && python -m venv "${VIRTUAL_ENV}" \
+    && pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir "datamodel-code-generator[http]==${VERSION}"
 
-ARG VERSION
+FROM python:3.14.2-slim-bookworm
+
+LABEL maintainer="Koudai Aono <koxudaxi@gmail.com>"
+
+ENV VIRTUAL_ENV=/opt/datamodel-code-generator
+ENV PATH="${VIRTUAL_ENV}/bin:${PATH}"
 
-RUN pip install "datamodel-code-generator[http]==$VERSION"
+RUN useradd --create-home --shell /usr/sbin/nologin appuser
+COPY --from=builder --chown=appuser:appuser /opt/datamodel-code-generator /opt/datamodel-code-generator
+USER appuser
 
 ENTRYPOINT ["datamodel-codegen"]