diff --git a/lib/active_model/serializer/adapter/json_api.rb b/lib/active_model/serializer/adapter/json_api.rb
index f604b67f..b74daaf8 100644
--- a/lib/active_model/serializer/adapter/json_api.rb
+++ b/lib/active_model/serializer/adapter/json_api.rb
@@ -16,7 +16,7 @@ module ActiveModel
         end
 
         def serializable_hash(options = {})
-          @root = (@options[:root] || serializer.json_key.to_s.pluralize).to_sym
+          @root = 'data'
 
           if serializer.respond_to?(:each)
             @hash[@root] = serializer.map do |s|