diff --git a/debian/changelog b/debian/changelog
index 603092e..0e88148 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,6 +1,7 @@
 node-nth-check (1.0.1-2) UNRELEASED; urgency=medium
 
   * Trim trailing whitespace.
+  * Use secure copyright file specification URI.
 
  -- Debian Janitor <janitor@jelmer.uk>  Wed, 08 Apr 2020 15:32:27 +0000
 
diff --git a/debian/copyright b/debian/copyright
index 5d14b32..ca79191 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: nth-check
 Upstream-Contact: https://github.com/fb55/nth-check/issues
 Source: https://github.com/fb55/nth-check