gulp version update
diff --git a/gulpfile.js b/gulpfile.js
index 19f2b3e..686b58c 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -16,7 +16,7 @@
 var htmlreplace = require('gulp-html-replace');
 var eventstream = require("event-stream");
 
-var bm_version = '4.5.9';
+var bm_version = '4.6.0';
 
 var files = [
     {