diff --git a/CHANGELOG.md b/CHANGELOG.md
index 84e5a96..5389ad2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 * Bundle dependencies (thanks [@tats-u](https://github.com/tats-u))
 
+### Fixed
+
+* comments in README (thanks [@KimSoungRyoul](https://github.com/KimSoungRyoul))
+
 ## [2.1.0] - 2020-08-15
 
 ### Changed
diff --git a/README.md b/README.md
index 05d405c..18bbd87 100644
--- a/README.md
+++ b/README.md
@@ -67,8 +67,8 @@ steps:
   with:
     key: ${{ secrets.SSH_KEY_OF_TARGET }}
     name: id_rsa-target
-    known_hosts: ${{ secrets.KNOWN_HOSTS_OF_TARGET }} # will be appended!
-    config: |                                         # will be appended!
+    known_hosts: ${{ secrets.KNOWN_HOSTS_OF_TARGET }} # will be appended to existing .ssh/known_hosts
+    config: |                                         # will be appended to existing .ssh/config
       Host target
         HostName yyy.yyy.yyy.yyy
         User user-of-target