diff --git a/Synology-NAS-Guide.md b/Synology-NAS-Guide.md
index 21f9939..2ce5bb2 100644
--- a/Synology-NAS-Guide.md
+++ b/Synology-NAS-Guide.md
@@ -54,7 +54,7 @@ export CERT_DNS="dns_cf"
 
 ## Deploy the default certificate
 
-This section has pre-updated, before [PR#5023](https://github.com/acmesh-official/acme.sh/pull/5023) got merged, you shall read [the old doc](https://github.com/acmesh-official/acme.sh/wiki/Synology-NAS-Guide/f26524f15d8e14fdc3c2cd7b75ce7eaf1d7eb532).
+**This section has been pre-updated, before [PR#5023](https://github.com/acmesh-official/acme.sh/pull/5023) got merged, you shall read [the old doc](https://github.com/acmesh-official/acme.sh/wiki/Synology-NAS-Guide/f26524f15d8e14fdc3c2cd7b75ce7eaf1d7eb532).**
 
 We will use the [Synology DSM deployhook](https://github.com/acmesh-official/acme.sh/wiki/deployhooks#20-deploy-the-certificate-to-synology-dsm) to deploy our certificate. This will override the default certificate (if you haven't set any description for it), you can learn how to create new certificates to be used for other services later in this section.