diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2d86ceb34d..376bfd1c4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,7 +21,9 @@ The following sections list the changes for 1.3.0.
 
  * Change #19: Add TLS support for http services
 
-   `ocis-pkg` http services support TLS.
+   `ocis-pkg` http services support TLS. The idea behind is setting the issuer on phoenix's
+   `config.json` to `https`. Or in other words, use https to access the Kopano extension, and
+   authenticate using an SSL certificate.
 
    https://github.com/owncloud/ocis-pkg/issues/19