diff --git a/app/controllers/health_monitor/health_controller.rb b/app/controllers/health_monitor/health_controller.rb
index 121ab81..3e979aa 100644
--- a/app/controllers/health_monitor/health_controller.rb
+++ b/app/controllers/health_monitor/health_controller.rb
@@ -14,7 +14,7 @@ def check
       respond_to do |format|
         format.html
         format.json do
-          render json: statuses
+          render json: statuses.to_json
         end
         format.xml do
           render xml: statuses