diff --git a/How-to-install.md b/How-to-install.md
index d545e13..d6df4fe 100644
--- a/How-to-install.md
+++ b/How-to-install.md
@@ -55,7 +55,7 @@ Explanations :
 
 - `--home` is a customized dir to install `acme.sh` in.  By default, it installs into `~/.acme.sh` 
 - `--config-home` is a writable folder, acme.sh will all the files(including cert/keys, configs) there. By default, it's same as `--home`
-- `--certhome` is a customized dir to save the certs you issue.  By default, it saves the certs in `--home`.
+- `--certhome` is a customized dir to save the certs you issue.  By default, it's same as `--config-home`.
 - `--accountemail` is the email used to register account to Let's Encrypt,  you will receive renewal notice email here. Default is empty.
 - `--accountkey` is the file saving your account private key.  By default it's saved in `--home`.
 - `--useragent`  is the user-agent header value used to send to Let's Encrypt.