diff --git a/debian/changelog b/debian/changelog
index 3e29871..0db684d 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 barrnap (0.9+dfsg-1) UNRELEASED; urgency=medium
 
   * New upstream release.
+  * Use secure d/copyright format link.
 
  -- Sascha Steinbiss <satta@debian.org>  Mon, 07 May 2018 15:18:43 +0200
 
diff --git a/debian/copyright b/debian/copyright
index d675e3a..1b621a8 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: barrnap
 Source: https://github.com/Victorian-Bioinformatics-Consortium/barrnap
 Files-Excluded: binaries/* build/* LICENSE.SILVA