diff --git a/main.js b/main.js
index 807448f3..97009cce 100644
--- a/main.js
+++ b/main.js
@@ -179,6 +179,7 @@ function main() {
     this.canvas = {};
 
     this.__VERSION__ = "2.5.4";
+    this.__VERSION_CODE__ = 20;
 }
 
 main.prototype.init = function (mode, callback) {