diff --git a/src/SerializerGenerator.php b/src/SerializerGenerator.php
index 12fa8ad..fe4d556 100644
--- a/src/SerializerGenerator.php
+++ b/src/SerializerGenerator.php
@@ -257,10 +257,13 @@ private function generateCodeForArray(
 
     private static function isArrayForPrimitive(PropertyTypeArray $type): bool
     {
-        return match ($type->getSubType()::class) {
-            PropertyTypePrimitive::class => true,
-            PropertyTypeArray::class => self::isArrayForPrimitive($type->getSubType()),
-            default => false,
-        };
+        do {
+            $type = $type->getSubType();
+            if ($type instanceof PropertyTypePrimitive) {
+                return true;
+            }
+        } while ($type instanceof PropertyTypeArray);
+
+        return false;
     }
 }