diff --git a/action.yml b/action.yml
index e4511aa..6fe85c1 100644
--- a/action.yml
+++ b/action.yml
@@ -1,3 +1,4 @@
+# https://help.github.com/en/articles/metadata-syntax-for-github-actions
 name: "Install SSH Key"
 description: "Install SSH key to ~/.ssh"
 author: "shimataro"