diff --git a/Synology-NAS-Guide.md b/Synology-NAS-Guide.md
index 5c4b79f..1eb8ff2 100644
--- a/Synology-NAS-Guide.md
+++ b/Synology-NAS-Guide.md
@@ -119,7 +119,7 @@ Now you should be all good.
 
 ## Fix a broken environment after Synology DSM upgrade
 
-    $ cd /urs/local/share/acme.sh
+    $ cd /usr/local/share/acme.sh
     $ ./acme.sh --upgrade --nocron --home /usr/local/share/acme.sh
 
 or manually add below line into /root/.profile