diff --git a/debian/changelog b/debian/changelog
index 9176f0d..ef4ed2d 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,7 +1,11 @@
 nagios-snmp-plugins (2.1.0-2) UNRELEASED; urgency=medium
 
+  [ Jan Wagner ]
   *
 
+  [ Debian Janitor ]
+  * Use secure copyright file specification URI.
+
  -- Jan Wagner <waja@cyconet.org>  Wed, 23 Jan 2019 22:34:43 +0100
 
 nagios-snmp-plugins (2.1.0-1) unstable; urgency=medium
diff --git a/debian/copyright b/debian/copyright
index 0eb246b..4663e5d 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -1,4 +1,4 @@
-Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: Nagios SNMP Plugins
 Upstream-Contact: Patrick Proy (nagios at proy.org)
 Source: http://www.manubulon.com/nagios