diff --git a/lets-encrypt/letsencrypt.conf b/lets-encrypt/letsencrypt.conf
index 4839af7..6aad889 100644
--- a/lets-encrypt/letsencrypt.conf
+++ b/lets-encrypt/letsencrypt.conf
@@ -1,3 +1,4 @@
+# only modify the values, key files will be generated automaticly.
 ACCOUNT_KEY="letsencrypt-account.key"
 DOMAIN_KEY="letsencrypt.key"
 DOMAIN_DIR="/var/www/lets-encrypt"