diff --git a/CHANGES.md b/CHANGES.md
index 70beb16..2c273ef 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,6 +9,7 @@
 
 ### Add
 
+* The `igbinary` extension, so Appwrite can store cache entries as binary payloads through the `Igbinary` codec in `utopia-php/cache` instead of JSON.
 * Weekly dependency automation (`.github/workflows/dependencies.yml`). A scheduled job resolves the newest upstream release for every pinned Dockerfile source, rewrites the pins, opens a pull request, waits for the exact CI runs for that head, approves and merges it, then tags, builds, and publishes the release. A `recover` step resumes a run that died between merge and publish, so a half-finished release is completed rather than duplicated.
 * PHP automation domain under `.github/scripts` — `Dependency` (catalog, resolvers, Dockerfile pin rewriting, reporting), `Automation` (release orchestration, version selection, merge and target validation, recovery), `Command`, and `Parity`. Entry points are `bin/dependencies.php`, `bin/orchestrator.php`, and `bin/parity.php`.
 * Composer tooling for the automation: `lint` (Pint), `check` (PHPStan), `test` (PHPUnit), `parity` (asserts every source class has covering tests), and `verify` to run all four. CI runs `composer verify` before touching any dependency.
diff --git a/Dockerfile b/Dockerfile
index 5e42bdd..75c716e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -159,6 +159,23 @@ RUN \
   cp $(php-config --extension-dir)/brotli.so /artifacts/ && \
   strip /artifacts/brotli.so
 
+# igbinary 3.2.17RC1 is the first tag that builds on PHP 8.5, and no final
+# 3.2.17 exists yet. The dependency updater only understands x.y.z pins, so the
+# commit is inlined here rather than declared as PHP_IGBINARY_VERSION/COMMIT;
+# move it into the catalog (.github/scripts/src/Dependency/Catalog.php) once
+# igbinary tags a final release.
+FROM compile AS igbinary
+RUN \
+  git init igbinary && \
+  cd igbinary && \
+  git fetch --depth 1 https://github.com/igbinary/igbinary.git edda7101adf583df047d028a154abf3bf04ced61 && \
+  git checkout FETCH_HEAD && \
+  phpize && \
+  ./configure && \
+  make -j"$(nproc)" && make install && \
+  cp $(php-config --extension-dir)/igbinary.so /artifacts/ && \
+  strip /artifacts/igbinary.so
+
 FROM compile AS lz4
 RUN \
   git init lz4 && \
@@ -303,6 +320,7 @@ WORKDIR /usr/src/code
 
 COPY --from=core-extensions /artifacts/ /tmp/exts/
 COPY --from=brotli   /artifacts/ /tmp/exts/
+COPY --from=igbinary /artifacts/ /tmp/exts/
 COPY --from=imagick  /artifacts/ /tmp/exts/
 COPY --from=lz4      /artifacts/ /tmp/exts/
 COPY --from=maxmind  /artifacts/ /tmp/exts/
@@ -320,6 +338,7 @@ RUN cp /tmp/exts/*.so $(php-config --extension-dir)/ && \
     docker-php-ext-enable \
       brotli \
       gd \
+      igbinary \
       imagick \
       intl \
       lz4 \
diff --git a/tests.yaml b/tests.yaml
index 9b6cce0..e06b8fe 100644
--- a/tests.yaml
+++ b/tests.yaml
@@ -44,6 +44,7 @@ commandTests:
       - gd
       - hash
       - iconv
+      - igbinary
       - imagick
       - intl
       - json