diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 7649c4c189..7746f24f90 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -42,7 +42,7 @@ jobs:
                 with:
                     php-version: "${{ matrix.php }}"
                     extensions: intl
-                    tools: symfony
+                    tools: symfony, composer-unused
                     coverage: none
 
             -
@@ -101,6 +101,10 @@ jobs:
                 name: Install PHP dependencies
                 run: composer install --no-interaction
 
+            -
+                name: Check for unused dependencies
+                run: composer-unused -o github
+
             -
                 name: Get Yarn cache directory
                 id: yarn-cache
diff --git a/composer-unused.php b/composer-unused.php
new file mode 100644
index 0000000000..96c6ec4b10
--- /dev/null
+++ b/composer-unused.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+use ComposerUnused\ComposerUnused\Configuration\Configuration;
+use ComposerUnused\ComposerUnused\Configuration\PatternFilter;
+use ComposerUnused\ComposerUnused\Configuration\NamedFilter;
+use Webmozart\Glob\Glob;
+
+return static function (Configuration $config): Configuration {
+    return $config
+        ->addNamedFilter(NamedFilter::fromString('symfony/flex'))
+        ->setAdditionalFilesFor(
+            'sylius/sylius-standard',
+            [__DIR__ . '/config/bundles.php', __DIR__ . '/config/bootstrap.php']
+        )
+    ;
+};