diff --git a/composer.json b/composer.json
index 72193a7..4811993 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
         "test": "./vendor/bin/phpunit"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^3.52",
-        "phpunit/phpunit": "^10.5.16"
+        "friendsofphp/php-cs-fixer": "^3.58",
+        "phpunit/phpunit": "^10.5.20"
     }
 }
diff --git a/src/MultiLazyStreamWriter.php b/src/MultiLazyStreamWriter.php
index 1f3d3e7..5c833e1 100644
--- a/src/MultiLazyStreamWriter.php
+++ b/src/MultiLazyStreamWriter.php
@@ -56,7 +56,7 @@ public function trigger(): void
 
         try {
             while ($this->dataProvider->valid()) {
-                $data = $this->dataProvider->current();
+                $data = $this->dataProvider->current() ?? '';
 
                 foreach ($this->handles as $uri => $handle) {
                     if (false === \fwrite($handle, $data)) {