diff --git a/DOCUMENTATION.md b/DOCUMENTATION.md
index 3d328a63..ffc108f7 100644
--- a/DOCUMENTATION.md
+++ b/DOCUMENTATION.md
@@ -2091,7 +2091,7 @@ Radicale has been packaged for:
 
 * [ArchLinux](https://www.archlinux.org/packages/community/any/radicale/) by
   David Runge
-* [Debian](http://packages.debian.org/radicale) by Jonas Smedegaard
+* [Debian](https://packages.debian.org/radicale) by Jonas Smedegaard
 * [Gentoo](https://packages.gentoo.org/packages/www-apps/radicale)
   by René Neumann, Maxim Koltsov and Manuel Rüger
 * [Fedora/EnterpriseLinux](https://src.fedoraproject.org/rpms/radicale) by Jorti