diff --git a/dnsapi.md b/dnsapi.md
index 792236e..a86a937 100644
--- a/dnsapi.md
+++ b/dnsapi.md
@@ -2479,6 +2479,7 @@ acme.sh --issue --dns dns_anx -d example.com -d www.example.com
 Please report any issue to https://github.com/acmesh-official/acme.sh/issues/3238
 
 ## 122. Use Synology DSM Synology DNS Server API
+Note that in order the script to be working properly acme.sh should be installed on Synology itself.
 To issue a cert:
 
     ./acme.sh --issue --dns dns_synology_dsm -d example.com -d www.example.com