Changelog.md

@@ -2,7 +2,7 @@ This page is used to log service changes.
 
 ## 6 Feb 2019
 
-* Upgraded to GitLab 11.7.5 which addresses some security issues.
+* Upgraded to GitLab 11.7.5 which includes some [security issues](https://about.gitlab.com/2019/02/05/critical-security-release-gitlab-11-dot-7-dot-4-released/) addressed in 11.7.4.
 
 ## 25 Jan 2019