diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 18c04fc..97994cc 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -21,7 +21,15 @@ jobs:
       packages: write
     strategy:
       matrix:
-        lancedb: ["0.3.1", "0.3.4", "0.5", "0.16.0", "0.24.3", "0.29.2", "0.33.0", "0.36.0"]
+        include:
+          - { lancedb: "0.3.1", dockerfile: ./docker/Dockerfile.legacy }
+          - { lancedb: "0.3.4", dockerfile: ./docker/Dockerfile.legacy }
+          - { lancedb: "0.5", dockerfile: ./docker/Dockerfile.legacy }
+          - { lancedb: "0.16.0", dockerfile: ./docker/Dockerfile }
+          - { lancedb: "0.24.3", dockerfile: ./docker/Dockerfile }
+          - { lancedb: "0.29.2", dockerfile: ./docker/Dockerfile }
+          - { lancedb: "0.33.0", dockerfile: ./docker/Dockerfile }
+          - { lancedb: "0.36.0", dockerfile: ./docker/Dockerfile }
 
     steps:
     - name: Checkout repository
@@ -64,7 +72,7 @@ jobs:
       uses: docker/build-push-action@v7
       with:
         context: .
-        file: ./docker/Dockerfile
+        file: ${{ matrix.dockerfile }}
         load: true
         platforms: linux/amd64
         tags: smoke:${{ matrix.lancedb }}
@@ -126,7 +134,7 @@ jobs:
       uses: docker/build-push-action@v7
       with:
         context: .
-        file: ./docker/Dockerfile
+        file: ${{ matrix.dockerfile }}
         push: ${{ github.event_name != 'pull_request' }}
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
@@ -141,17 +149,27 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        lancedb: ["0.3.1", "0.3.4", "0.5", "0.16.0", "0.24.3", "0.29.2", "0.33.0", "0.36.0"]
+        include:
+          - { lancedb: "0.3.1", legacy: true }
+          - { lancedb: "0.3.4", legacy: true }
+          - { lancedb: "0.5", legacy: true }
+          - { lancedb: "0.16.0", legacy: false }
+          - { lancedb: "0.24.3", legacy: false }
+          - { lancedb: "0.29.2", legacy: false }
+          - { lancedb: "0.33.0", legacy: false }
+          - { lancedb: "0.36.0", legacy: false }
     steps:
     - name: Checkout repository
       uses: actions/checkout@v5
 
     - name: Set up Python
+      if: matrix.legacy == false
       uses: actions/setup-python@v6
       with:
         python-version: '3.11'
 
     - name: Install dependencies
+      if: matrix.legacy == false
       run: |
         python -m pip install --upgrade pip
         pip install -c backend/constraints-${{ matrix.lancedb }}.txt \
@@ -160,6 +178,23 @@ jobs:
         pip install pytest httpx2
 
     - name: Run API endpoint tests
+      if: matrix.legacy == false
       run: |
         cd backend
         python -m pytest tests/ -v
+
+    - name: Build legacy test environment
+      if: matrix.legacy == true
+      run: |
+        docker build \
+          -f docker/Dockerfile.legacy-test \
+          --build-arg LANCEDB_VERSION=${{ matrix.lancedb }} \
+          -t legacy-tests:${{ matrix.lancedb }} \
+          .
+
+    - name: Run API endpoint tests in legacy environment
+      if: matrix.legacy == true
+      run: |
+        docker run --rm \
+          -v "${GITHUB_WORKSPACE}:/src:ro" \
+          legacy-tests:${{ matrix.lancedb }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ffe5678..97d2270 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 - `docker build` no longer fails with "the destination must be a directory and end with a /". `COPY backend/*.py .` needs a trailing slash when it copies more than one file. The classic builder rejected it, the BuildKit builder did not (#62).
 - CI publishes no image until the test job passes. The build job now depends on the test job, so a failing test stops the release (#66).
+- CI and release builds preserve the legacy LanceDB 0.3.1, 0.3.4, and 0.5 variants by reusing their last published dependency layers. Their packages are no longer available from PyPI (#92).
 
 ## [0.3.1] - 2026-06-11
 
diff --git a/README.md b/README.md
index bc6719e..ef1e184 100644
--- a/README.md
+++ b/README.md
@@ -149,7 +149,9 @@ docker build -f docker/Dockerfile \
 # Build multiple versions for testing
 docker build -f docker/Dockerfile --build-arg LANCEDB_VERSION=0.24.3 -t lance-data-viewer:lancedb-0.24.3 .
 docker build -f docker/Dockerfile --build-arg LANCEDB_VERSION=0.16.0 -t lance-data-viewer:lancedb-0.16.0 .
-docker build -f docker/Dockerfile --build-arg LANCEDB_VERSION=0.3.4 -t lance-data-viewer:lancedb-0.3.4 .
+
+# Legacy packages are no longer on PyPI, so reuse their published dependency layer
+docker build -f docker/Dockerfile.legacy --build-arg LANCEDB_VERSION=0.3.4 -t lance-data-viewer:lancedb-0.3.4 .
 
 # Make your Lance data readable (one-time setup)
 chmod -R o+rx data
@@ -177,7 +179,9 @@ cd backend && python -m pytest tests/ -v
 ```
 
 Swap the constraints file to test against a different Lance version. CI runs
-the suite against every supported version.
+the suite against every supported version. LanceDB 0.3.1, 0.3.4, and 0.5 can
+only be tested through their published images because their packages are no
+longer available from PyPI.
 
 ### Development workflow
 
@@ -237,4 +241,4 @@ The viewer provides advanced visualization for vector embeddings:
 ### Contributing
 
 See [CONTRIBUTING.md](CONTRIBUTING.md) for the design constraints and how to
-propose changes. Release history lives in [CHANGELOG.md](CHANGELOG.md).
\ No newline at end of file
+propose changes. Release history lives in [CHANGELOG.md](CHANGELOG.md).
diff --git a/docker/Dockerfile.legacy b/docker/Dockerfile.legacy
new file mode 100644
index 0000000..1f9ba70
--- /dev/null
+++ b/docker/Dockerfile.legacy
@@ -0,0 +1,51 @@
+ARG LEGACY_IMAGE=ghcr.io/lance-format/lance-data-viewer
+ARG LANCEDB_VERSION=0.3.4
+
+# LanceDB 0.3.1, 0.3.4, and 0.5 are no longer available from PyPI. Preserve
+# their installed dependency trees from the last published multi-arch images,
+# then build a clean runtime image with the current application source.
+FROM ${LEGACY_IMAGE}:lancedb-${LANCEDB_VERSION} AS legacy-dependencies
+
+FROM python:3.11-slim-bookworm
+
+RUN groupadd -r appuser && useradd -r -g appuser -u 1001 appuser
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=legacy-dependencies /home/appuser/.local /home/appuser/.local
+
+WORKDIR /app
+
+COPY backend/*.py ./
+COPY VERSION .
+COPY docker/entrypoint.sh /app/entrypoint.sh
+COPY web/vanilla/ /web/
+
+RUN chmod +x /app/entrypoint.sh
+RUN chown -R appuser:appuser /app /web
+RUN chmod -R 755 /web
+
+USER appuser
+
+ENV PATH=/home/appuser/.local/bin:$PATH
+ENV DATA_PATH=/data
+ENV PORT=8080
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -fsS http://localhost:${PORT}/healthz || exit 1
+
+ARG LANCEDB_VERSION=0.3.4
+ARG APP_VERSION=0.0.0-dev
+
+LABEL org.opencontainers.image.title="Lance Data Viewer"
+LABEL org.opencontainers.image.description="Read-only web viewer for Lance datasets"
+LABEL org.opencontainers.image.source="https://github.com/lance-format/lance-data-viewer"
+LABEL org.opencontainers.image.version="${APP_VERSION}"
+LABEL org.opencontainers.image.licenses="MIT"
+LABEL com.github.lancedb.version="${LANCEDB_VERSION}"
+
+ENTRYPOINT ["/app/entrypoint.sh"]
diff --git a/docker/Dockerfile.legacy-test b/docker/Dockerfile.legacy-test
new file mode 100644
index 0000000..09738f6
--- /dev/null
+++ b/docker/Dockerfile.legacy-test
@@ -0,0 +1,14 @@
+ARG LEGACY_IMAGE=ghcr.io/lance-format/lance-data-viewer
+ARG LANCEDB_VERSION=0.3.4
+
+# Reuse only the unavailable legacy dependency set. The repository is mounted
+# at /src when this image runs, so pytest always exercises the checked-out code.
+FROM ${LEGACY_IMAGE}:lancedb-${LANCEDB_VERSION}
+
+USER root
+RUN python -m pip install --no-cache-dir pytest httpx2
+
+ENV PYTHONPATH=/home/appuser/.local/lib/python3.11/site-packages
+WORKDIR /src/backend
+ENTRYPOINT ["python", "-m", "pytest", "-o", "cache_dir=/tmp/pytest_cache", "tests/"]
+CMD ["-v"]