diff --git a/README.md b/README.md
index b72d9c35..91ee221a 100644
--- a/README.md
+++ b/README.md
@@ -56,13 +56,13 @@ To test out the demo, you may login to the [Dashboard](https://dev.cachethq.io/d
 
 If you'd like to contribute translations, please check out our [CrowdIn project](https://crowdin.com/project/cachet).
 
-## Professional Installation Service
-
-We offer a professional installation service. To find out more, email us at [support@alt-three.com](mailto:support@alt-three.com?Cachet%20Installation)
-
 ## Security Vulnerabilities
 
-If you discover a security vulnerability within Cachet, please send an e-mail to us at support@alt-three.com. We handle all security vulnerabilities on a case-by-case basis.
+If you discover a security vulnerability within Cachet, please send an e-mail to [support@cachethq.io](mailto:support@cachethq.io?Cachet%20Security%20Vulnerability). All security vulnerabilities on a case-by-case basis.
+
+## Professional Installation Service
+
+A professional installation service is offered by Alt Three Services Limited. To find out more, contact [support@alt-three.com](mailto:support@alt-three.com?Cachet%20Installation). *Note: this is a different email address to our security contact address.*
 
 ## Sponsorship