diff --git a/README.md b/README.md
index acc9db1..8181575 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# hexo-deployer-s3 
+# hexo-deployer-s3
 
 Amazon S3 deployer plugin for [Hexo](http://hexo.io/)
 
@@ -17,8 +17,8 @@ You can configure this plugin in `_config.yml`.
 deploy:
   type: s3
   bucket: <S3 bucket>
-  aws_key: <AWS id key>  // Optional, if the environment variable `AWS_KEY` is set
-  aws_secret: <AWS secret key>  // Optional, if the environment variable `AWS_SECRET` is set
+  aws_key: <AWS id key>  // Optional, if the environment variable `AWS_ACCESS_KEY_ID` is set
+  aws_secret: <AWS secret key>  // Optional, if the environment variable `AWS_SECRET_ACCESS_KEY` is set
   concurrency: <number of connections> // Optional
   region: <region>  // Optional, see https://github.com/LearnBoost/knox#region
 ```