diff --git a/scripts/upt.lua b/scripts/upt.lua
index ef559b3..25d4d6c 100644
--- a/scripts/upt.lua
+++ b/scripts/upt.lua
@@ -3,6 +3,10 @@ package.path = package.path .. ';<SCRIPT_PATH>/?.lua';
 --todo: add verify
 
 local Upt = require("lib.upt")
+local cjson = require "cjson"
+
 local uri = ngx.unescape_uri(ngx.var.arg_uri)
 ngx.log(ngx.INFO, 'URI -> ' .. uri)
-ngx.say(Upt.upt(uri))
\ No newline at end of file
+
+ngx.say(cjson.encode({r = true, d = Upt.upt(uri), e = nil}))
+