diff --git a/lib/index.js b/lib/index.js
index 9abfa58..fd1e398 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,7 +3,7 @@
 const axios = require('axios')
 const uuid = require('uuid/v4')
 
-const { throwError, getParamsArray, signature } = require('./Utils')
+const { throwError, getParamsArray, signature } = require('./utils')
 
 const url = 'https://dm.aliyuncs.com/'
 const FORMAT_TYPE = ['json', 'xml']
diff --git a/lib/Utils.js b/lib/utils.js
similarity index 100%
rename from lib/Utils.js
rename to lib/utils.js