diff --git a/.github/workflows/composerAudit.yaml b/.github/workflows/composerAudit.yaml
new file mode 100644
index 0000000..dc196b6
--- /dev/null
+++ b/.github/workflows/composerAudit.yaml
@@ -0,0 +1,30 @@
+on: [push]
+name: Composer Audit Check
+jobs:
+  composer-audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Read the current used PHP Version
+        id: get-php-version
+        run: echo "::set-output name=version $(head -n1 .php-version)"
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ steps.get-php-version.outputs.version }}
+          tools: pecl, composer:2
+
+      - name: Get composer cache directory
+        id: composer-cache
+        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache dependencies
+        uses: actions/cache@v3
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('composer.lock') }}
+          restore-keys: ${{ runner.os }}-composer-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-scripts --no-dev
+
+      - run: composer audit
\ No newline at end of file
diff --git a/src/AkeneoApi.php b/src/AkeneoApi.php
index 0efe8d3..5ee9dba 100644
--- a/src/AkeneoApi.php
+++ b/src/AkeneoApi.php
@@ -22,5 +22,5 @@ public function getCategories(string $rootCode): CategoryItem;
     /**
      * @throws AkeneoApiException
      */
-    public function triggerUpdate(string $identifier, string $message = null): void;
+    public function triggerUpdate(string $identifier, ?string $message = null): void;
 }
diff --git a/src/AkeneoApiException.php b/src/AkeneoApiException.php
index 02f51ee..2e8be4f 100644
--- a/src/AkeneoApiException.php
+++ b/src/AkeneoApiException.php
@@ -11,7 +11,7 @@
 
 class AkeneoApiException extends \Exception
 {
-    protected function __construct(string $message = '', \Throwable $previous = null)
+    protected function __construct(string $message = '', ?\Throwable $previous = null)
     {
         parent::__construct($message, 0, $previous);
     }
diff --git a/src/CachedSymfonyHttpClientAkeneoApi.php b/src/CachedSymfonyHttpClientAkeneoApi.php
index 6625b4c..9f6183a 100644
--- a/src/CachedSymfonyHttpClientAkeneoApi.php
+++ b/src/CachedSymfonyHttpClientAkeneoApi.php
@@ -64,7 +64,7 @@ public function getCategories(string $rootCode): CategoryItem
         return $item;
     }
 
-    public function triggerUpdate(string $identifier, string $message = null): void
+    public function triggerUpdate(string $identifier, ?string $message = null): void
     {
         $this->decorated->triggerUpdate($identifier);
     }
diff --git a/src/SymfonyHttpClientAkeneoApi.php b/src/SymfonyHttpClientAkeneoApi.php
index d275ddf..22701d3 100644
--- a/src/SymfonyHttpClientAkeneoApi.php
+++ b/src/SymfonyHttpClientAkeneoApi.php
@@ -80,7 +80,7 @@ public function getCategories(string $rootCode): CategoryItem
     /**
      * @throws AkeneoApiException
      */
-    public function triggerUpdate(string $identifier, string $message = null): void
+    public function triggerUpdate(string $identifier, ?string $message = null): void
     {
         $this->assertProductExists($identifier);