diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6f2466c..9bc2b1b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,42 +6,27 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-
-      - uses: docker/setup-buildx-action@v3
-
-      - name: Build soffice image
-        uses: docker/build-push-action@v6
-        with:
-          context: benchmarks
-          file: benchmarks/Dockerfile.soffice-debian
-          tags: soffice:latest
-          load: true
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+      - uses: actions/checkout@v6
 
-      - name: Start soffice
-        run: |
-          docker run --detach --name soffice \
-            --publish 2002:2002 \
-            --volume /tmp:/tmp \
-            soffice
-          timeout 30 bash -c 'until nc -z localhost 2002; do sleep 1; done'
+      - uses: cachix/install-nix-action@v31
 
       - uses: erlef/setup-beam@v1
         id: beam
         with:
-          elixir-version: 1.19.5
-          otp-version: 28.3
+          elixir-version: 1.20.2
+          otp-version: 29.0.3
 
       - name: Restore dependencies cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             deps
@@ -50,7 +35,7 @@ jobs:
           restore-keys: ${{ runner.os }}-mix-
 
       - name: Restore PLT cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: priv/plts
           key: ${{ runner.os }}-plt-otp${{ steps.beam.outputs.otp-version }}-${{ hashFiles('**/mix.lock') }}-${{ github.sha }}
@@ -67,8 +52,46 @@ jobs:
       - name: Check formatting
         run: mix format --check-formatted
 
-      - name: Run tests
-        run: mix test --include lo26
+      - name: Check unused dependencies
+        run: mix deps.unlock --check-unused
+
+      - name: Check dependency cycles
+        run: mix xref graph --format cycles --fail-above 0
+
+      - name: Run unit tests without soffice
+        run: mix test
+
+      - name: Build documentation
+        run: mix docs --warnings-as-errors
+
+      - name: Audit Hex dependencies
+        run: mix hex.audit
+
+      - name: Check Nix flake
+        run: nix flake check
 
       - name: Run dialyzer
         run: mix dialyzer
+
+      - uses: docker/setup-buildx-action@v4
+
+      - name: Build soffice image
+        uses: docker/build-push-action@v7
+        with:
+          context: benchmarks
+          file: benchmarks/Dockerfile.soffice-debian
+          tags: soffice:latest
+          load: true
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Start soffice
+        run: |
+          docker run --detach --name soffice \
+            --publish 2002:2002 \
+            --volume /tmp:/tmp \
+            soffice
+          timeout 30 bash -c 'until nc -z localhost 2002; do sleep 1; done'
+
+      - name: Run integration tests
+        run: mix test --include lo26
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f6cdcf0..05b92f5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,15 +14,15 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: erlef/setup-beam@v1
         with:
-          elixir-version: "1.19.5"
-          otp-version: "28.3"
+          elixir-version: "1.20.2"
+          otp-version: "29.0.3"
 
       - name: Restore dependencies cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             deps
diff --git a/PERFORMANCE.md b/PERFORMANCE.md
index 25d3dc9..d238948 100644
--- a/PERFORMANCE.md
+++ b/PERFORMANCE.md
@@ -11,7 +11,9 @@ docker compose --file benchmarks/docker-compose.yml up --detach --wait
 mix run benchmarks/bench.exs
 ```
 
-Both URP and Gotenberg run LibreOffice 26.2.0 on Debian (glibc).
+The results below were recorded on July 14, 2026, on Apple M3 Max with
+Elixir 1.20.2 and Erlang/OTP 29.0.3. URP's Debian container ran
+LibreOffice 26.2.4.2; Gotenberg 8.32.0 bundled LibreOffice 26.2.2.2.
 The fixture uses Liberation fonts only — regenerate with
 `uv run --with python-docx --with Pillow --with numpy benchmarks/generate_fixture.py`
 (pass `--size 15` for the large variant).
@@ -22,22 +24,39 @@ The fixture uses Liberation fonts only — regenerate with
 
 ```
 Name                         ips        average  deviation         median         99th %
-URP                         1.05         0.95 s     ±7.60%         0.94 s         1.20 s
-Gotenberg                   0.81         1.23 s     ±7.47%         1.19 s         1.42 s
+URP                         1.37         0.73 s     ±4.74%         0.72 s         0.82 s
+Gotenberg                   0.84         1.19 s     ±5.46%         1.16 s         1.37 s
 ```
 
 **15.5 MB input → 62 MB PDF:**
 
 ```
 Name                         ips        average  deviation         median         99th %
-URP                        0.145         6.87 s     ±7.44%         6.73 s         7.44 s
-Gotenberg                  0.087        11.45 s     ±1.21%        11.45 s        11.54 s
+URP                        0.196         5.10 s     ±2.12%         5.05 s         5.22 s
+Gotenberg                  0.135         7.39 s     ±0.88%         7.36 s         7.46 s
 ```
 
-**27% faster** for small documents, **67% faster** for large ones.
-The gap grows because Gotenberg's Go/HTTP overhead (multipart parsing,
-queue management, response framing) scales with document size, while
-URP talks to soffice directly over a TCP socket.
+URP had **39% lower average latency** for the small document and **31%
+lower average latency** for the large document. The absolute advantage
+grew from 0.46 s to 2.29 s. These measurements compare the complete
+stacks, including their slightly different LibreOffice patch versions;
+they do not isolate dependency or runtime upgrades individually.
+
+### Process overhead sanity check
+
+`benchmarks/convert.exs` compares the persistent URP connection with a
+cold `soffice --convert-to` process and Gotenberg using the 33 KB
+`sample3.docx` fixture. Across five timed iterations, the averages were:
+
+| Method | Average | Range |
+|--------|---------|-------|
+| URP | 46 ms | 43–49 ms |
+| Gotenberg | 153 ms | 146–160 ms |
+| LibreOffice CLI | 280 ms | 267–302 ms |
+
+This is a process-overhead check, not an apples-to-apples transport
+benchmark: URP reuses a live office process, while the CLI measurement
+starts a new process for every conversion.
 
 ## I/O strategies
 
@@ -53,10 +72,25 @@ and transfers them over URP in ~6 round-trips. **Stream I/O** (`:stream`)
 pipes bytes over the URP socket via XInputStream/XOutputStream — no temp
 disk, but more round-trips.
 
-Stream input is the bottleneck (~40-50% slower) because ZIP-based formats
-(docx, xlsx, pptx) require thousands of XInputStream/XSeekable random-access
-round-trips. Stream output adds negligible overhead — soffice writes in
-fixed [32 767-byte chunks](https://github.com/LibreOffice/core/blob/libreoffice-26-2-0/sfx2/source/doc/docfile.cxx#L2573),
+Current results on Elixir 1.20.2 / OTP 29.0.3:
+
+| Strategy | 2.7 MB | 16.2 MB | 35.0 MB |
+|----------|--------|---------|---------|
+| File → file | 1.13 s | 7.66 s | 39.17 s |
+| File → stream | 1.19 s | 8.06 s | 37.19 s |
+| Stream → file | 1.72 s | 11.59 s | 41.53 s |
+| Stream → stream | 1.64 s | 9.06 s | 46.02 s |
+
+Stream input remains the bottleneck because ZIP-based formats (docx,
+xlsx, pptx) require thousands of XInputStream/XSeekable random-access
+round-trips, but its measured penalty now ranges from roughly 12% to 52%
+depending on document size and output mode. Stream output remains within
+about 5% of file output. The 35 MB fixture completes only one iteration
+per scenario with the default 10-second Benchee window, so treat those
+figures as directional rather than statistically stable.
+
+Soffice writes stream output in fixed
+[32 767-byte chunks](https://github.com/LibreOffice/core/blob/libreoffice-26-2-0/sfx2/source/doc/docfile.cxx#L2573),
 so the round-trip count is predictable.
 
 | Strategy | Input | Output | Best for |
@@ -109,22 +143,22 @@ and can be mitigated with
 It bundles OpenJDK 11, 130+ Noto font packages, and 450 packages
 total.
 
-As of March 2026, Alpine ships LO 25.8.x (Still) while Debian
+As of July 2026, Alpine ships LO 25.8.x (Still) while Debian
 trixie-backports has 26.2.x (Fresh). Carlito is missing from the
 stock Alpine image (`apk add font-carlito` to fix).
 
 | Setup | 2.6 MB | 15.5 MB | LO version | Image size |
 |-------|--------|---------|------------|------------|
-| URP → Debian glibc | 0.94 s | 6.73 s | 26.2.0 | ~564 MB |
-| URP → Alpine musl | 1.20 s | 11.11 s | 25.8.1 | ~1.78 GB |
-| Gotenberg (Debian glibc) | 1.19 s | 11.45 s | 26.2.0 | ~1.86 GB |
+| URP → Debian glibc | 0.72 s | 5.05 s | 26.2.4.2 | ~564 MB |
+| URP → Alpine musl | 1.18 s | 7.94 s | 25.8.1.1 | ~1.78 GB |
+| Gotenberg (Debian glibc) | 1.16 s | 7.36 s | 26.2.2.2 | ~1.68 GB |
 
 <details>
 <summary>Reproducing the strace analysis</summary>
 
 ```sh
 docker compose --file benchmarks/docker-compose.yml up --detach --wait
-SOFFICE=benchmarks-soffice-1
+SOFFICE=benchmarks-soffice-alpine-1
 docker exec $SOFFICE apk add --no-cache strace
 docker exec $SOFFICE pgrep -f soffice.bin  # note the PID
 
diff --git a/README.md b/README.md
index 7a4b0d6..c60f2bf 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ no Python, no wrappers, no sidecars.
 ## Installation
 
 ```elixir
-{:urp, "~> 0.8"}
+{:urp, "~> 0.10"}
 ```
 
 ## Prerequisites
@@ -69,6 +69,14 @@ URP.Test.stub(fn _input, _opts -> {:ok, "/tmp/fake.pdf"} end)
 assert {:ok, _} = MyApp.generate_invoice(order)
 ```
 
+When soffice is unavailable, tests tagged `:integration` are excluded automatically.
+Run the complete suite, including the LibreOffice 26.2+ coverage, with:
+
+```sh
+docker compose --file benchmarks/docker-compose.yml up --detach --wait soffice
+mix test --include lo26
+```
+
 ### Telemetry
 
 Every operation emits `[:urp, :call, :stop]` with queue, service, and
diff --git a/benchmarks/Dockerfile.soffice-debian b/benchmarks/Dockerfile.soffice-debian
index 6f114c6..dbb6d18 100644
--- a/benchmarks/Dockerfile.soffice-debian
+++ b/benchmarks/Dockerfile.soffice-debian
@@ -1,4 +1,4 @@
-# Minimal Debian soffice with LO from trixie-backports (same version as Gotenberg).
+# Minimal Debian soffice with LibreOffice 26.2+ from trixie-backports.
 # Only free fonts — Liberation (Arial/Times metric-compatible) and Carlito (Calibri).
 FROM debian:trixie-slim
 
@@ -16,5 +16,4 @@ ENV PORT=2002
 
 EXPOSE ${PORT}
 
-CMD soffice --headless --norestore \
-    --accept="socket,host=${HOST},port=${PORT},tcpNoDelay=1;urp;"
+CMD ["sh", "-c", "exec soffice --headless --norestore --accept=\"socket,host=${HOST},port=${PORT},tcpNoDelay=1;urp;\""]
diff --git a/benchmarks/bench.exs b/benchmarks/bench.exs
index 15f9885..f438b1a 100644
--- a/benchmarks/bench.exs
+++ b/benchmarks/bench.exs
@@ -18,7 +18,7 @@ gotenberg_url = "http://localhost:3002/forms/libreoffice/convert"
 IO.puts("Fixture: #{fixture} (#{div(byte_size(docx_bytes), 1024)} KB)\n")
 
 # Gotenberg-equivalent FilterData — matches DefaultOptions() from
-# https://github.com/gotenberg/gotenberg/blob/v8.27.0/pkg/modules/libreoffice/api/api.go
+# https://github.com/gotenberg/gotenberg/blob/v8.32.0/pkg/modules/libreoffice/api/api.go
 gotenberg_filter_data = [
   ExportFormFields: true,
   AllowDuplicateFieldNames: false,
@@ -52,26 +52,26 @@ Application.ensure_all_started(:telemetry)
 {:ok, _} = Finch.start_link(name: Req.Finch)
 form_data = [files: {docx_bytes, filename: fixture, content_type: "application/octet-stream"}]
 
-# ── Debian pool (port 2003) ──
+# ── Alpine pool (port 2003) ──
 
-{:ok, _} = URP.Pool.start_link(name: :debian, host: "localhost", port: 2003, pool_size: 1)
+{:ok, _} = URP.Pool.start_link(name: :alpine, host: "localhost", port: 2003, pool_size: 1)
 
 # ── Warmup all services ──
 
 {:ok, _} = URP.convert({:binary, docx_bytes}, urp_opts)
-{:ok, _} = URP.Pool.convert(:debian, {:binary, docx_bytes}, urp_opts)
+{:ok, _} = URP.Pool.convert(:alpine, {:binary, docx_bytes}, urp_opts)
 Req.post!(gotenberg_url, form_multipart: form_data)
 
 # ── Benchmark ──
 
 Benchee.run(
   %{
-    "URP → Alpine musl" => fn ->
+    "URP → Debian glibc" => fn ->
       {:ok, pdf} = URP.convert({:binary, docx_bytes}, urp_opts)
       pdf
     end,
-    "URP → Debian glibc" => fn ->
-      {:ok, pdf} = URP.Pool.convert(:debian, {:binary, docx_bytes}, urp_opts)
+    "URP → Alpine musl" => fn ->
+      {:ok, pdf} = URP.Pool.convert(:alpine, {:binary, docx_bytes}, urp_opts)
       pdf
     end,
     "Gotenberg (HTTP)" => fn ->
diff --git a/benchmarks/convert.exs b/benchmarks/convert.exs
index 66248b4..b9f3bbb 100644
--- a/benchmarks/convert.exs
+++ b/benchmarks/convert.exs
@@ -1,13 +1,13 @@
 # Simple benchmark: URP vs CLI shell-out vs Gotenberg
 #
-# All three use LibreOffice 25.8.1 for apples-to-apples comparison.
+# Record each service's LibreOffice version when comparing benchmark results.
 #
 # Prerequisites:
 #   1. soffice container on port 2002 (URP)
 #   2. soffice-cli container with /fixtures mount (CLI — separate instance to avoid lock)
-#   3. gotenberg:8.23.1 on GOTENBERG_PORT (HTTP API)
+#   3. Gotenberg service from docker-compose.yml on GOTENBERG_PORT (HTTP API)
 #
-#   cd benchmarks && docker compose up -d
+#   docker compose --file benchmarks/docker-compose.yml up --detach --wait
 #
 # Run:
 #   nix develop --command mix run benchmarks/convert.exs
diff --git a/benchmarks/docker-compose.yml b/benchmarks/docker-compose.yml
index f1f12e4..03722df 100644
--- a/benchmarks/docker-compose.yml
+++ b/benchmarks/docker-compose.yml
@@ -5,29 +5,39 @@
 #   nix develop --command mix run benchmarks/bench.exs
 #
 # Services:
-#   soffice         — Alpine (musl), URP on port 2002
-#   soffice-debian  — Debian (glibc), URP on port 2003, LO from trixie-backports
+#   soffice         — Debian (glibc), URP on port 2002, LO 26.2+ from trixie-backports
+#   soffice-cli     — idle Debian container for cold CLI shell-out comparisons
+#   soffice-alpine  — Alpine (musl), URP on port 2003, comparison service
 #   gotenberg       — Gotenberg full stack (Debian glibc), HTTP on port 3002
 
 services:
   soffice:
-    image: libreofficedocker/alpine:3.23
-    command:
-      - soffice
-      - --headless
-      - --norestore
-      - --accept=socket,host=0.0.0.0,port=2002,tcpNoDelay=1;urp;
+    build:
+      context: .
+      dockerfile: Dockerfile.soffice-debian
     ports:
       - "2002:2002"
 
-  soffice-debian:
+  soffice-cli:
     build:
       context: .
       dockerfile: Dockerfile.soffice-debian
+    container_name: soffice-cli
+    command: ["sleep", "infinity"]
+    volumes:
+      - ./fixtures:/fixtures:ro
+
+  soffice-alpine:
+    image: libreofficedocker/alpine:3.23
+    command:
+      - soffice
+      - --headless
+      - --norestore
+      - --accept=socket,host=0.0.0.0,port=2002,tcpNoDelay=1;urp;
     ports:
       - "2003:2002"
 
   gotenberg:
-    image: gotenberg/gotenberg:8.27.0
+    image: gotenberg/gotenberg:8.32.0
     ports:
       - "3002:3000"
diff --git a/benchmarks/io_bench.exs b/benchmarks/io_bench.exs
index 64c0195..3444851 100644
--- a/benchmarks/io_bench.exs
+++ b/benchmarks/io_bench.exs
@@ -14,7 +14,7 @@
 # Environment:
 #   FIXTURES — comma-separated filenames in benchmarks/fixtures/ (default: all)
 #   FILTER   — export filter name (default: writer_pdf_Export)
-#   PORT     — soffice port (default: 2003, the Debian glibc instance)
+#   PORT     — soffice port (default: 2002, the Debian glibc instance)
 #
 # Stream output overhead is negligible (<5%) regardless of file size.
 # soffice writes in fixed 32767-byte chunks — a hardcoded literal in
@@ -27,7 +27,7 @@
 default_fixtures = "benchmark.docx,benchmark-15mb.docx,benchmark-50mb.docx"
 fixtures = System.get_env("FIXTURES", default_fixtures) |> String.split(",", trim: true)
 filter = System.get_env("FILTER", "writer_pdf_Export")
-port = System.get_env("PORT", "2003") |> String.to_integer()
+port = System.get_env("PORT", "2002") |> String.to_integer()
 
 Application.ensure_all_started(:telemetry)
 
diff --git a/flake.lock b/flake.lock
index 450d227..6bea735 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1771923393,
-        "narHash": "sha256-Fy0+UXELv9hOE8WjYhJt8fMDLYTU2Dqn3cX4BwoGBos=",
+        "lastModified": 1783915482,
+        "narHash": "sha256-FmieJB8/OUvNxbkboi7+IGfIuSXY3nF/hZQm8kD0r50=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ea7f1f06811ce7fcc81d6c6fd4213150c23edcf2",
+        "rev": "6cdc7fc76e8bf7fde9fa43a849fcaaa70e230dee",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index c486c22..4c4d4d8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,13 +11,13 @@
       devShells = forAllSystems (system:
         let
           pkgs = nixpkgs.legacyPackages.${system};
-          beamPackages = pkgs.beam.packages.erlang_28;
+          beamPackages = pkgs.beam.packages.erlang_29;
         in
         {
           default = pkgs.mkShell {
             packages = [
               beamPackages.erlang
-              beamPackages.elixir_1_19
+              beamPackages.elixir_1_20
               pkgs.git
               pkgs.uv
             ];
diff --git a/lib/urp/bridge.ex b/lib/urp/bridge.ex
index df0d56a..314b077 100644
--- a/lib/urp/bridge.ex
+++ b/lib/urp/bridge.ex
@@ -608,9 +608,6 @@ defmodule URP.Bridge do
 
   ## Send + receive + parse
 
-  # Error-guard: short-circuit if an earlier step failed.
-  defp call(%__MODULE__{error: e} = conn, _frame) when not is_nil(e), do: conn
-
   defp call(%__MODULE__{} = conn, frame) do
     conn
     |> send_frame(frame)
diff --git a/lib/urp/stream.ex b/lib/urp/stream.ex
index 8a3949a..1994c7a 100644
--- a/lib/urp/stream.ex
+++ b/lib/urp/stream.ex
@@ -27,7 +27,6 @@ defmodule URP.Stream do
       XOutputStream: writeBytes=3, flush=4, closeOutput=5
   """
 
-  alias URP.Bridge
   alias URP.Protocol, as: P
 
   import Bitwise
@@ -38,6 +37,7 @@ defmodule URP.Stream do
            | {:file, pid(), non_neg_integer()}
            | {:enum, binary(), pid() | :eof}
   @type sink :: nil | {:path, Path.t()} | (binary() -> any())
+  @type connection :: map()
 
   @tc_void 0
   @tc_new 0x80
@@ -67,8 +67,8 @@ defmodule URP.Stream do
   Dispatches calls until we receive the reply to our pending request.
   Returns `{reply_payload, updated_conn}`.
   """
-  @spec recv_handling_input(Bridge.t(), input_source() | source(), String.t() | nil) ::
-          {binary(), Bridge.t()}
+  @spec recv_handling_input(connection(), input_source() | source(), String.t() | nil) ::
+          {binary(), connection()}
   def recv_handling_input(conn, data, stream_oid \\ nil)
 
   def recv_handling_input(conn, data, stream_oid) when is_binary(data) do
@@ -126,10 +126,10 @@ defmodule URP.Stream do
   outside the main stream recv loop. Returns `:not_input` if the request
   doesn't match the active input stream context.
   """
-  @spec try_handle_input(Bridge.t(), binary()) :: {:handled, Bridge.t()} | :not_input
-  def try_handle_input(%Bridge{input_ctx: nil}, _payload), do: :not_input
+  @spec try_handle_input(connection(), binary()) :: {:handled, connection()} | :not_input
+  def try_handle_input(%{input_ctx: nil}, _payload), do: :not_input
 
-  def try_handle_input(%Bridge{input_ctx: ctx} = conn, payload) do
+  def try_handle_input(%{input_ctx: ctx} = conn, payload) do
     %{func_id: func_id, body: body, type_cache: type_cache, tid: new_tid} =
       P.parse_request(payload)
 
@@ -286,7 +286,7 @@ defmodule URP.Stream do
     * `{:path, path}` — write chunks to file as they arrive, returns `{reply, :ok, conn}`
     * `fun/1` — call with each chunk, returns `{reply, :ok, conn}`
   """
-  @spec recv_handling_output(Bridge.t(), sink()) :: {binary(), binary() | :ok, Bridge.t()}
+  @spec recv_handling_output(connection(), sink()) :: {binary(), binary() | :ok, connection()}
   def recv_handling_output(conn, sink \\ nil)
 
   def recv_handling_output(conn, nil) do
@@ -399,7 +399,7 @@ defmodule URP.Stream do
   defp read_chunk({:enum, buffer, reader}, n) do
     {buffer, reader} = fill_buffer(buffer, reader, n)
     to_read = min(n, byte_size(buffer))
-    <<chunk::binary-size(to_read), rest::binary>> = buffer
+    <<chunk::binary-size(^to_read), rest::binary>> = buffer
     {chunk, {:enum, rest, reader}}
   end
 
@@ -418,7 +418,7 @@ defmodule URP.Stream do
   defp skip_chunk({:enum, buffer, reader}, n) do
     {buffer, reader} = fill_buffer(buffer, reader, n)
     skip = min(n, byte_size(buffer))
-    <<_::binary-size(skip), rest::binary>> = buffer
+    <<_::binary-size(^skip), rest::binary>> = buffer
     {:enum, rest, reader}
   end
 
diff --git a/mix.exs b/mix.exs
index 690d073..29029db 100644
--- a/mix.exs
+++ b/mix.exs
@@ -7,7 +7,7 @@ defmodule URP.MixProject do
     [
       app: :urp,
       version: @version,
-      elixir: "~> 1.19",
+      elixir: "~> 1.20",
       description:
         "Pure Elixir client for the UNO Remote Protocol — convert documents via LibreOffice over TCP",
       package: package(),
@@ -48,7 +48,7 @@ defmodule URP.MixProject do
       {:nimble_ownership, "~> 1.0"},
       {:nimble_pool, "~> 1.1"},
       {:telemetry, "~> 1.0"},
-      {:req, "~> 0.5", only: :dev, runtime: false},
+      {:req, "~> 0.6", only: :dev, runtime: false},
       {:benchee, "~> 1.3", only: :dev, runtime: false}
     ]
   end
diff --git a/mix.lock b/mix.lock
index 9399ac8..7c2456f 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,23 +1,23 @@
 %{
-  "benchee": {:hex, :benchee, "1.5.0", "4d812c31d54b0ec0167e91278e7de3f596324a78a096fd3d0bea68bb0c513b10", [:mix], [{:deep_merge, "~> 1.0", [hex: :deep_merge, repo: "hexpm", optional: false]}, {:statistex, "~> 1.1", [hex: :statistex, repo: "hexpm", optional: false]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "5b075393aea81b8ae74eadd1c28b1d87e8a63696c649d8293db7c4df3eb67535"},
-  "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
+  "benchee": {:hex, :benchee, "1.5.1", "b95cbc36c4b98969a5c592a246e171041eb683c56bad1cb4f49a3b081ba66087", [:mix], [{:deep_merge, "~> 1.0", [hex: :deep_merge, repo: "hexpm", optional: false]}, {:statistex, "~> 1.1", [hex: :statistex, repo: "hexpm", optional: false]}, {:table, "~> 0.1.0", [hex: :table, repo: "hexpm", optional: true]}], "hexpm", "a539301f8dfd4efc5c5123bfb9d47ebde20092a863a5b5b16c2a60d2243dfce7"},
+  "deep_merge": {:hex, :deep_merge, "1.0.2", "476aa7ea61c54de96220051b998d893869069094da65b96101aebf79416f8a1e", [:mix], [], "hexpm", "737a53cdc9758fedbb608bdc213969e65729466c4ef3cd8e8726d0335dff116c"},
   "dialyxir": {:hex, :dialyxir, "1.4.7", "dda948fcee52962e4b6c5b4b16b2d8fa7d50d8645bbae8b8685c3f9ecb7f5f4d", [:mix], [{:erlex, ">= 0.2.8", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "b34527202e6eb8cee198efec110996c25c5898f43a4094df157f8d28f27d9efe"},
-  "earmark_parser": {:hex, :earmark_parser, "1.4.44", "f20830dd6b5c77afe2b063777ddbbff09f9759396500cdbe7523efd58d7a339c", [:mix], [], "hexpm", "4778ac752b4701a5599215f7030989c989ffdc4f6df457c5f36938cc2d2a2750"},
-  "erlex": {:hex, :erlex, "0.2.8", "cd8116f20f3c0afe376d1e8d1f0ae2452337729f68be016ea544a72f767d9c12", [:mix], [], "hexpm", "9d66ff9fedf69e49dc3fd12831e12a8a37b76f8651dd21cd45fcf5561a8a7590"},
-  "ex_doc": {:hex, :ex_doc, "0.40.1", "67542e4b6dde74811cfd580e2c0149b78010fd13001fda7cfeb2b2c2ffb1344d", [:mix], [{:earmark_parser, "~> 1.4.44", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "bcef0e2d360d93ac19f01a85d58f91752d930c0a30e2681145feea6bd3516e00"},
-  "finch": {:hex, :finch, "0.21.0", "b1c3b2d48af02d0c66d2a9ebfb5622be5c5ecd62937cf79a88a7f98d48a8290c", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.6.2 or ~> 1.7", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 1.1", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "87dc6e169794cb2570f75841a19da99cfde834249568f2a5b121b809588a4377"},
-  "hpax": {:hex, :hpax, "1.0.3", "ed67ef51ad4df91e75cc6a1494f851850c0bd98ebc0be6e81b026e765ee535aa", [:mix], [], "hexpm", "8eab6e1cfa8d5918c2ce4ba43588e894af35dbd8e91e6e55c817bca5847df34a"},
-  "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
-  "makeup": {:hex, :makeup, "1.2.1", "e90ac1c65589ef354378def3ba19d401e739ee7ee06fb47f94c687016e3713d1", [:mix], [{:nimble_parsec, "~> 1.4", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "d36484867b0bae0fea568d10131197a4c2e47056a6fbe84922bf6ba71c8d17ce"},
+  "earmark_parser": {:hex, :earmark_parser, "1.4.45", "cba8369ab2a1342e419bc2760eec731b17be828941dcf494045d44766227e1d5", [:mix], [], "hexpm", "d3ec045bf122965db20c0bdb420e19ee1415843135327124918473feb4b328e8"},
+  "erlex": {:hex, :erlex, "0.2.9", "7debbbaa9f4f368b8cd648983e0f1d7963028508e9c59e9d4ed504e94ef52a55", [:mix], [], "hexpm", "8cfffc0ec7159e6d73de2ab28a588064de80f88b2798d5cbe4482cbbc200178b"},
+  "ex_doc": {:hex, :ex_doc, "0.40.3", "4a972ffe64bc07dc605af487e98fc19b72a4185f55ca031b94c0552d6071c1d9", [:mix], [{:earmark_parser, "~> 1.4.44", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "2756e357742fecd9749b489b85d67c9ce99c465f2e75728d9e6dc8d704b973de"},
+  "finch": {:hex, :finch, "0.23.0", "e3f9287ac25a8832f848b144c2b57346aac65b205e2e0629a52adfe6507fd837", [:mix], [{:mime, "~> 1.0 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:mint, "~> 1.8", [hex: :mint, repo: "hexpm", optional: false]}, {:nimble_options, "~> 0.4 or ~> 1.0", [hex: :nimble_options, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 1.1", [hex: :nimble_pool, repo: "hexpm", optional: false]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "80e58d3f936f57e3fdf404f83a3642897ae6d9fb642934e46da4d8fe761b99d5"},
+  "hpax": {:hex, :hpax, "1.0.4", "777de5d433b0fbdc7c418159c8055910faa8047ffdb3d6b31098d2a46cd7685c", [:mix], [], "hexpm", "afc7cb142ebcc2d01ce7816190b98ce5dd49e799111b24249f3443d730f377ca"},
+  "jason": {:hex, :jason, "1.4.5", "2e3a008590b0b8d7388c20293e9dcc9cf3e5d642fd2a114e4cbbb52e595d940a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0 or ~> 3.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "b0c823996102bcd0239b3c2444eb00409b72f6a140c1950bc8b457d836b30684"},
+  "makeup": {:hex, :makeup, "1.2.2", "882d46dc0905e9ff7abf2aab61a7e6b3dcc555533977d8a23b06019e6c89ac94", [:mix], [{:nimble_parsec, "~> 1.4", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "9a1a24e5b343b8ae16abea0822c10a6f75da27af7fa802ada5251f7579bfccfa"},
   "makeup_elixir": {:hex, :makeup_elixir, "1.0.1", "e928a4f984e795e41e3abd27bfc09f51db16ab8ba1aebdba2b3a575437efafc2", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}, {:nimble_parsec, "~> 1.2.3 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "7284900d412a3e5cfd97fdaed4f5ed389b8f2b4cb49efc0eb3bd10e2febf9507"},
-  "makeup_erlang": {:hex, :makeup_erlang, "1.0.3", "4252d5d4098da7415c390e847c814bad3764c94a814a0b4245176215615e1035", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "953297c02582a33411ac6208f2c6e55f0e870df7f80da724ed613f10e6706afd"},
+  "makeup_erlang": {:hex, :makeup_erlang, "1.1.0", "835f7e60792e08824cda445639555d7bf1bbbddb1b60b306e33cb6f6db24dc74", [:mix], [{:makeup, "~> 1.0", [hex: :makeup, repo: "hexpm", optional: false]}], "hexpm", "1cd6780fb1dd1a03979abaed0fe82712b0625118fd5257d3ebbf73f960c73c3c"},
   "mime": {:hex, :mime, "2.0.7", "b8d739037be7cd402aee1ba0306edfdef982687ee7e9859bee6198c1e7e2f128", [:mix], [], "hexpm", "6171188e399ee16023ffc5b76ce445eb6d9672e2e241d2df6050f3c771e80ccd"},
-  "mint": {:hex, :mint, "1.7.1", "113fdb2b2f3b59e47c7955971854641c61f378549d73e829e1768de90fc1abf1", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1 or ~> 0.2.0 or ~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "fceba0a4d0f24301ddee3024ae116df1c3f4bb7a563a731f45fdfeb9d39a231b"},
+  "mint": {:hex, :mint, "1.9.2", "6e89e698d69cc29be001afd02c2cf4bae2d0994efe69a2ced7aab440d71584f9", [:mix], [{:castore, "~> 0.1.0 or ~> 1.0", [hex: :castore, repo: "hexpm", optional: true]}, {:hpax, "~> 0.1.1 or ~> 0.2.0 or ~> 1.0", [hex: :hpax, repo: "hexpm", optional: false]}], "hexpm", "d8e952b432fdac2321f570d29a68b9eb2664dc80a7a2ef9464531a5425abf222"},
   "nimble_options": {:hex, :nimble_options, "1.1.1", "e3a492d54d85fc3fd7c5baf411d9d2852922f66e69476317787a7b2bb000a61b", [:mix], [], "hexpm", "821b2470ca9442c4b6984882fe9bb0389371b8ddec4d45a9504f00a66f650b44"},
   "nimble_ownership": {:hex, :nimble_ownership, "1.0.2", "fa8a6f2d8c592ad4d79b2ca617473c6aefd5869abfa02563a77682038bf916cf", [:mix], [], "hexpm", "098af64e1f6f8609c6672127cfe9e9590a5d3fcdd82bc17a377b8692fd81a879"},
   "nimble_parsec": {:hex, :nimble_parsec, "1.4.2", "8efba0122db06df95bfaa78f791344a89352ba04baedd3849593bfce4d0dc1c6", [:mix], [], "hexpm", "4b21398942dda052b403bbe1da991ccd03a053668d147d53fb8c4e0efe09c973"},
   "nimble_pool": {:hex, :nimble_pool, "1.1.0", "bf9c29fbdcba3564a8b800d1eeb5a3c58f36e1e11d7b7fb2e084a643f645f06b", [:mix], [], "hexpm", "af2e4e6b34197db81f7aad230c1118eac993acc0dae6bc83bac0126d4ae0813a"},
-  "req": {:hex, :req, "0.5.17", "0096ddd5b0ed6f576a03dde4b158a0c727215b15d2795e59e0916c6971066ede", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.17", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 2.0.6 or ~> 2.1", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "0b8bc6ffdfebbc07968e59d3ff96d52f2202d0536f10fef4dc11dc02a2a43e39"},
-  "statistex": {:hex, :statistex, "1.1.0", "7fec1eb2f580a0d2c1a05ed27396a084ab064a40cfc84246dbfb0c72a5c761e5", [:mix], [], "hexpm", "f5950ea26ad43246ba2cce54324ac394a4e7408fdcf98b8e230f503a0cba9cf5"},
-  "telemetry": {:hex, :telemetry, "1.3.0", "fedebbae410d715cf8e7062c96a1ef32ec22e764197f70cda73d82778d61e7a2", [:rebar3], [], "hexpm", "7015fc8919dbe63764f4b4b87a95b7c0996bd539e0d499be6ec9d7f3875b79e6"},
+  "req": {:hex, :req, "0.6.2", "b9b2024f35bcf60a92cc8cad2eaaf9d4e7aace463ff74be1afe5986830184413", [:mix], [{:brotli, "~> 0.3.1", [hex: :brotli, repo: "hexpm", optional: true]}, {:ezstd, "~> 1.0", [hex: :ezstd, repo: "hexpm", optional: true]}, {:finch, "~> 0.21", [hex: :finch, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: false]}, {:mime, "~> 2.0.6 or ~> 2.1", [hex: :mime, repo: "hexpm", optional: false]}, {:nimble_csv, "~> 1.0", [hex: :nimble_csv, repo: "hexpm", optional: true]}, {:plug, "~> 1.0", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "cc9cd30a2ddd04989929b887178e1610c940456d962c6c3a52df6146d2eef9bf"},
+  "statistex": {:hex, :statistex, "1.1.1", "73612aa7f79e53c30569be065fd121e380f1cf57bc4c2da5b41be9246da18df9", [:mix], [], "hexpm", "310c4b49b34adf683de3103639006bed233ab54c08a4add65a531448e653857c"},
+  "telemetry": {:hex, :telemetry, "1.4.2", "a0cb522801dffb1c49fe6e30561badffc7b6d0e180db1300df759faa22062855", [:rebar3], [], "hexpm", "928f6495066506077862c0d1646609eed891a4326bee3126ba54b60af61febb1"},
 }
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 698e073..781e72c 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -1,11 +1,19 @@
-case :gen_tcp.connect(~c"localhost", 2002, [:binary], 1000) do
-  {:ok, sock} ->
-    :gen_tcp.close(sock)
+soffice_available? =
+  case :gen_tcp.connect(~c"localhost", 2002, [:binary], 1000) do
+    {:ok, sock} ->
+      :gen_tcp.close(sock)
+      true
 
-  {:error, _} ->
-    raise "soffice not reachable on localhost:2002 — start it before running tests"
-end
+    {:error, _} ->
+      false
+  end
 
 # Tests tagged :lo26 require LibreOffice 26.2+. Excluded by default for
 # local development with older soffice. CI includes them (--include lo26).
-ExUnit.start(exclude: [:lo26])
+excluded_tags = if soffice_available?, do: [:lo26], else: [:integration, :lo26]
+
+unless soffice_available? do
+  IO.puts("soffice not reachable on localhost:2002 — excluding integration tests")
+end
+
+ExUnit.start(exclude: excluded_tags)
diff --git a/test/urp/telemetry_test.exs b/test/urp/telemetry_test.exs
index 2d0d7a3..ce2fd92 100644
--- a/test/urp/telemetry_test.exs
+++ b/test/urp/telemetry_test.exs
@@ -56,5 +56,4 @@ defmodule URP.TelemetryTest do
     assert_receive {:telemetry_event, [:urp, :call, :stop], _measurements, metadata}
     assert metadata.result == :error
   end
-
 end
diff --git a/test/urp_test.exs b/test/urp_test.exs
index 1bdcf79..e18c11c 100644
--- a/test/urp_test.exs
+++ b/test/urp_test.exs
@@ -166,7 +166,6 @@ defmodule URPTest do
 
       assert "%PDF-" <> _ = pdf
     end
-
   end
 
   describe "settings" do
@@ -333,7 +332,6 @@ defmodule URPTest do
       Bridge.delete_file(conn, conn.cleanup_url)
       Bridge.close!(conn)
     end
-
   end
 
   describe "pool queuing" do
@@ -344,13 +342,13 @@ defmodule URPTest do
       task1 =
         Task.async(fn ->
           result = URP.convert({:binary, docx1}, filter: "Text", output: :binary)
-          {result, System.monotonic_time(:millisecond)}
+          {result, System.monotonic_time(:microsecond)}
         end)
 
       task2 =
         Task.async(fn ->
           result = URP.convert({:binary, docx2}, filter: "Text", output: :binary)
-          {result, System.monotonic_time(:millisecond)}
+          {result, System.monotonic_time(:microsecond)}
         end)
 
       {{:ok, text1}, t1} = Task.await(task1, 15_000)
@@ -361,10 +359,9 @@ defmodule URPTest do
       assert text2 =~ "Document Two"
 
       # With pool_size 1, conversions are serial. The second task must wait
-      # for the first to finish and return the worker. If they ran in parallel
-      # they'd finish at roughly the same time; serial execution means the
-      # completion timestamps are at least one conversion apart.
-      assert abs(t2 - t1) >= 10
+      # for the first to finish and return the worker, so their completion
+      # timestamps should be measurably separated even on fast machines.
+      assert abs(t2 - t1) >= 1_000
     end
   end
 
@@ -429,7 +426,6 @@ defmodule URPTest do
       nil -> 0
     end
   end
-
 end
 
 defmodule URP.DocTest do