diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cbb542e5..7c7f131f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -50,5 +50,8 @@ jobs:
         with:
           dependency-versions: '${{ matrix.deps }}'
 
+      - name: 'Validate dependencies'
+        run: './vendor/bin/composer-dependency-analyser --show-all-usages'
+
       - name: 'Run test suite'
         run: 'php vendor/bin/phpunit'
diff --git a/.php-cs-fixer.dist.php b/.php-cs-fixer.dist.php
index bcc531f2..418c4639 100644
--- a/.php-cs-fixer.dist.php
+++ b/.php-cs-fixer.dist.php
@@ -7,6 +7,7 @@
         __DIR__ . '/src',
         __DIR__ . '/tests',
     ])
+    ->notPath('var')
 ;
 
 return (new PhpCsFixer\Config())
diff --git a/composer-dependency-analyser.php b/composer-dependency-analyser.php
new file mode 100644
index 00000000..ecd43ca0
--- /dev/null
+++ b/composer-dependency-analyser.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+use ShipMonk\ComposerDependencyAnalyser\Config\Configuration;
+use ShipMonk\ComposerDependencyAnalyser\Config\ErrorType;
+
+$config = new Configuration();
+
+return $config
+    ->addPathToScan(__DIR__.'/src', isDev: false)
+    ->addPathToScan(__DIR__.'/src/DataCollector', isDev: true)
+    ->addPathToScan(__DIR__.'/src/Debug', isDev: true)
+    ->addPathToScan(__DIR__.'/tests', isDev: true)
+
+    ->ignoreErrorsOnPackage('symfony/routing', [
+        ErrorType::DEV_DEPENDENCY_IN_PROD,
+    ])
+    ->ignoreErrorsOnPackage('twig/twig', [
+        ErrorType::DEV_DEPENDENCY_IN_PROD,
+    ])
+;
diff --git a/composer.json b/composer.json
index 598513c2..1ffd9ef4 100644
--- a/composer.json
+++ b/composer.json
@@ -23,14 +23,15 @@
     "require": {
         "php": ">=8.1",
         "ext-json": "*",
+        "psr/container": "^2.0",
+        "psr/log": "^3.0",
         "symfony/config": "^6.4 || ^7.0",
         "symfony/dependency-injection": "^6.4 || ^7.0",
         "symfony/filesystem": "^6.4 || ^7.0",
-        "symfony/http-client": "^6.4 || ^7.0",
+        "symfony/http-client-contracts": "^3.5",
         "symfony/http-foundation": "^6.4 || ^7.0",
         "symfony/http-kernel": "^6.4 || ^7.0",
-        "symfony/mime": "^6.4 || ^7.0",
-        "symfony/string": "^6.4 || ^7.0"
+        "symfony/mime": "^6.4 || ^7.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.41",
@@ -38,11 +39,15 @@
         "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-symfony": "^1.3",
         "phpunit/phpunit": "^10.4",
+        "shipmonk/composer-dependency-analyser": "^1.7",
         "symfony/framework-bundle": "^6.4 || ^7.0",
+        "symfony/http-client": "^6.4 || ^7.0",
         "symfony/monolog-bundle": "^3.10",
+        "symfony/routing": "^6.4 || ^7.0",
         "symfony/stopwatch": "^6.4 || ^7.0",
         "symfony/twig-bundle": "^6.4 || ^7.0",
-        "symfony/var-dumper": "^6.4 || ^7.0"
+        "symfony/var-dumper": "^6.4 || ^7.0",
+        "twig/twig": "^3.14"
     },
     "config": {
         "allow-plugins": {
diff --git a/tests/Builder/Pdf/AbstractChromiumPdfBuilderTest.php b/tests/Builder/Pdf/AbstractChromiumPdfBuilderTest.php
index 980b651c..d5155cfc 100644
--- a/tests/Builder/Pdf/AbstractChromiumPdfBuilderTest.php
+++ b/tests/Builder/Pdf/AbstractChromiumPdfBuilderTest.php
@@ -8,6 +8,7 @@
 use PHPUnit\Framework\Attributes\UsesClass;
 use Sensiolabs\GotenbergBundle\Builder\Pdf\AbstractChromiumPdfBuilder;
 use Sensiolabs\GotenbergBundle\Builder\Pdf\AbstractPdfBuilder;
+use Sensiolabs\GotenbergBundle\Enumeration\PaperSize;
 use Sensiolabs\GotenbergBundle\Enumeration\PaperSizeInterface;
 use Sensiolabs\GotenbergBundle\Enumeration\PdfFormat;
 use Sensiolabs\GotenbergBundle\Enumeration\Unit;
@@ -22,6 +23,7 @@
 #[CoversClass(AbstractChromiumPdfBuilder::class)]
 #[UsesClass(AbstractPdfBuilder::class)]
 #[UsesClass(Unit::class)]
+#[UsesClass(PaperSize::class)]
 #[UsesClass(AssetBaseDirFormatter::class)]
 #[UsesClass(GotenbergAssetExtension::class)]
 class AbstractChromiumPdfBuilderTest extends AbstractBuilderTestCase