diff --git a/debian/changelog b/debian/changelog
index 5cd7aab..c365d3a 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 libhdate (1.6.02-3) UNRELEASED; urgency=low
 
   * Trim trailing whitespace.
+  * Use secure copyright file specification URI.
 
  -- Debian Janitor <janitor@jelmer.uk>  Thu, 25 Jun 2020 19:40:18 -0000
 
diff --git a/debian/copyright b/debian/copyright
index 2fdf956..c1291d0 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: LibHdate
 Source: https://sourceforge.net/projects/libhdate/files/latest/download