diff --git a/How-to-install.md b/How-to-install.md
index 1970637..aeefadb 100644
--- a/How-to-install.md
+++ b/How-to-install.md
@@ -48,6 +48,8 @@ cd acme.sh
 --useragent  "this is my client."
 ```
 
+You don't need to set them all, just set those ones you care about.
+
 Explanations :
 
 - `--home` is a customized dir to install `acme.sh` in.  By default, it installs into `~/.acme.sh`