diff --git a/Synology-NAS-Guide.md b/Synology-NAS-Guide.md
index 4dfe964..4145a69 100644
--- a/Synology-NAS-Guide.md
+++ b/Synology-NAS-Guide.md
@@ -18,7 +18,7 @@ cd ~
 wget https://github.com/acmesh-official/acme.sh/archive/master.tar.gz
 tar xvf master.tar.gz
 cd acme.sh-master/
-./acme.sh --install --nocron --home /usr/local/share/acme.sh --accountemail "email@gmailcom"
+./acme.sh --install --nocron --home /usr/local/share/acme.sh --accountemail "email@gmail.com"
 source ~/.profile
 ```