diff --git a/architecture design proposal.md b/architecture design proposal.md
index eb7e707..f1caabf 100755
--- a/architecture design proposal.md	
+++ b/architecture design proposal.md	
@@ -134,7 +134,7 @@ A solution could be to define a transformer interface and let the transformers b
 ```php
 interface Transformer {
     public function get_supported_post_types(): array;
-    public function get_transformer_info(): string;
+    public function get_transformer_info(): array;
     public function to_object(WP_Post $post);
     ....
 }