diff --git a/composer.json b/composer.json
index db88963..13b03eb 100644
--- a/composer.json
+++ b/composer.json
@@ -18,9 +18,9 @@
         "php": "^8.0",
         "anteris-dev/faker-map": "^2.0",
         "fakerphp/faker": "^1.13",
-        "symfony/property-access": "^5.2",
-        "symfony/property-info": "^5.2",
-        "symfony/serializer": "^5.2"
+        "symfony/property-access": "^5.2 || ^6.0",
+        "symfony/property-info": "^5.2 || ^6.0",
+        "symfony/serializer": "^5.2 || ^6.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2.17",
diff --git a/src/PropertyFactory.php b/src/PropertyFactory.php
index 94335f7..f97c0d3 100644
--- a/src/PropertyFactory.php
+++ b/src/PropertyFactory.php
@@ -90,7 +90,12 @@ protected function extractDocBlockType(ReflectionProperty $property): ?string
             $type = $types[array_rand($types, 1)];
 
             if ($type->isCollection()) {
-                $collectionType = $type->getCollectionValueType();
+                // Patch for Symfony 6
+                if (method_exists($type,'getCollectionValueTypes')) {
+                    $collectionType = $type->getCollectionValueTypes()[0];
+                } else {
+                    $collectionType = $type->getCollectionValueType();
+                }
                 $className = $collectionType->getClassName() ?? $collectionType->getBuiltinType();
 
                 return $className . '[]';