diff --git a/doc/integration/README.md b/doc/integration/README.md
index c2fd299db07..e3f6d48904d 100644
--- a/doc/integration/README.md
+++ b/doc/integration/README.md
@@ -48,7 +48,11 @@ at SuperUser also has relevant information.
 
 **Omnibus Trusted Chain**
 
-It is enough to concatenate the certificate to the main trusted certificate:
+[Install the self signed certificate or custom certificate authorities](http://docs.gitlab.com/omnibus/common_installation_problems/README.html#using-self-signed-certificate-or-custom-certificate-authorities)
+in to GitLab Omnibus.
+
+It is enough to concatenate the certificate to the main trusted certificate
+however it may be overwritten during upgrades:
 
 ```bash
 cat jira.pem >> /opt/gitlab/embedded/ssl/certs/cacert.pem