diff --git a/extensions/scripting/lua-bindings/script/cocostudio/CocoStudio.lua b/extensions/scripting/lua-bindings/script/cocostudio/CocoStudio.lua
index 60fd56a67a..ee7254a958 100644
--- a/extensions/scripting/lua-bindings/script/cocostudio/CocoStudio.lua
+++ b/extensions/scripting/lua-bindings/script/cocostudio/CocoStudio.lua
@@ -2,9 +2,7 @@ if nil == ccs then
     return
 end
 
-if not json then
-    json = cjson
-end
+local json = require 'cjson'
 
 require "cocos.cocostudio.StudioConstants"
 
diff --git a/extensions/scripting/lua-bindings/script/init.lua b/extensions/scripting/lua-bindings/script/init.lua
index 670609c77e..ceeb043ec3 100644
--- a/extensions/scripting/lua-bindings/script/init.lua
+++ b/extensions/scripting/lua-bindings/script/init.lua
@@ -22,6 +22,7 @@ THE SOFTWARE.
 
 ]]
 
+-- lua-5.4
 if (math.pow == nil) then
     math.pow = function (x,y)
         return x ^ y