diff --git a/app/controllers/api/api_controller.rb b/app/controllers/api/api_controller.rb
index e49abf6..ecf89e2 100644
--- a/app/controllers/api/api_controller.rb
+++ b/app/controllers/api/api_controller.rb
@@ -87,7 +87,7 @@ def pept2taxa
     all_taxa = Set.new
 
     response_data["result"].each do |item|
-      all_taxa.merge(item.taxa)
+      all_taxa.merge(item["taxa"])
     end
 
     # Now, retrieve all information associated with the taxa