diff --git a/Synology-NAS-Guide.md b/Synology-NAS-Guide.md
index 5fdd977..25fec0d 100644
--- a/Synology-NAS-Guide.md
+++ b/Synology-NAS-Guide.md
@@ -138,4 +138,14 @@ or manually add below line into /root/.profile
 
 ```sh
 . "/usr/local/share/acme.sh/acme.sh.env"
-```
\ No newline at end of file
+```
+
+# Enable auto upgrading
+
+Enable [auto upgrade](https://github.com/acmesh-official/acme.sh?tab=readme-ov-file#14-how-to-upgrade-acmesh):
+
+`acme.sh --upgrade --auto-upgrade`
+
+Disable auto upgrade:
+
+`acme.sh --upgrade --auto-upgrade 0`