diff --git a/debian/copyright b/debian/copyright
index b0ac445..c2f29d7 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: frei0r-plugins
 Upstream-Contact: https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/frei0r
 Source: https://files.dyne.org/frei0r/